--- title: "CA $166 Cheap Flights from Pittsburgh (PIT) to St. Louis (STL)" description: "Cheap Flights from Pittsburgh (PIT) to St. Louis (STL) start at CA $166 for one-way and CA $374 for round trip. Earn your airline miles on top of our rewards!" canonical: "https://www.expedia.ca/lp/flights/pit/stl/pittsburgh-to-st-louis" language: en-CA market: CA currency: CAD prices_as_of: 2026-11-14T08:23:43Z --- # CA $166 Cheap Flights from Pittsburgh (PIT) to St. Louis (STL) ![A city skyline with a prominent arch bridge at sunset.](https://images.trvl-media.com/place/5002323/199e2ff7-9ba1-40d2-987c-00d8170be611.jpg?impolicy=fcrop&w=1200&h=500&q=medium) [View CA $166 flight on Thu, Dec 3, 2026](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:03/12/2026TANYT&trip=oneway&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:165.96&airProductToken=AQphCi8IxnISBDE2MTkYj5oBIMxwKODrngMw--yeAzhFQABYAWoEUENfMXIHUjIxVlhQMgouCMZyEgQyNjM1GMxwIPJcKNLtngMw9O6eAzhFQAFYAWoEUENfMXIHUjIxVlhQMhIKCAEQARgBKgJGORgBIgQIARABKAIoAygEMA0) ## Popular airlines from Pittsburgh International Airport (PIT) to Lambert-St. Louis International Airport (STL) [American Airlines](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:28/11/2026TANYT&leg2=from:STL,to:PIT,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) [Delta](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:28/11/2026TANYT&leg2=from:STL,to:PIT,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) [United](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:28/11/2026TANYT&leg2=from:STL,to:PIT,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) [Southwest Airlines](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:28/11/2026TANYT&leg2=from:STL,to:PIT,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) [Alaska Airlines](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:28/11/2026TANYT&leg2=from:STL,to:PIT,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) [Frontier Airlines](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:28/11/2026TANYT&leg2=from:STL,to:PIT,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) ### Be in the know Get alerts if flight prices drop or rise\* ### Book smarter Save up to 30% on select hotels after you book a flight\* ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) ## Cheap Flights from Pittsburgh to St. Louis (PIT-STL) Prices were available within the past 7 days and start at CA $166 for one-way flights and CA $374 for roundtrip, for the period specified. Prices and availability are subject to change. All deals One way Roundtrip [Select Frontier Airlines flight, departing Mon, Dec 7 from Pittsburgh to St. Louis, returning Wed, Dec 9, priced at CA $374 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:07/12/2026TANYT&leg2=from:STL,to:PIT,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:373.31&airProductToken=AQphCi8IxnISBDE2MTkYj5oBIMxwKOCYnwMw%5FJmfAzhFQABYAWoEUENfMXIHUjIxVlhQMgouCMZyEgQyNjM1GMxwIPJcKNKanwMw9JufAzhFQAFYAWoEUENfMXIHUjIxVlhQMhIKCAEQARgBKgJGORgBIgQIARABKAIoAygEMA0) Mon, Dec 7 - Wed, Dec 9 · PIT · STL · Roundtrip [Select Frontier Airlines flight, departing Mon, Dec 7 from Pittsburgh to St. Louis, returning Wed, Dec 9, priced at CA $381 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:07/12/2026TANYT&leg2=from:STL,to:PIT,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:380.91&airProductToken=AQphCi8IxnISBDE2MTkYj5oBIMxwKOCYnwMw%5FJmfAzhFQABYAWoEUENfMXIHUjIxVlhQMgouCMZyEgQyNjM1GMxwIPJcKNKanwMw9JufAzhFQAFYAWoEUENfMXIHUjIxVlhQMhIKCAEQARgBKgJGORgBIgQIARABKAIoAygEMA0) Mon, Dec 7 - Wed, Dec 9 · PIT · STL · Roundtrip [Select Frontier Airlines flight, departing Mon, Dec 7 from Pittsburgh to St. Louis, returning Wed, Dec 9, priced at CA $403 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:07/12/2026TANYT&leg2=from:STL,to:PIT,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:402.41&airProductToken=AQphCi8IxnISBDE2MTkYj5oBIMxwKOCYnwMw%5FJmfAzhFQABYAWoEUENfMXIHUjIxVlhQMgouCMZyEgQyNjM1GMxwIPJcKNKanwMw9JufAzhFQAFYAWoEUENfMXIHUjIxVlhQMhIKCAEQARgBKgJGORgBIgQIARABKAIoAygEMA0) Mon, Dec 7 - Wed, Dec 9 · PIT · STL · Roundtrip [Select Frontier Airlines flight, departing Mon, Dec 7 from Pittsburgh to St. Louis, returning Wed, Dec 9, priced at CA $431 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:07/12/2026TANYT&leg2=from:STL,to:PIT,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:430.31&airProductToken=AQphCi8IxnISBDE2MTkYj5oBIMxwKOCYnwMw%5FJmfAzhFQABYAWoEUENfMXIHUjIxVlhQMgouCMZyEgQyNjM1GMxwIPJcKNKanwMw9JufAzhFQAFYAWoEUENfMXIHUjIxVlhQMhIKCAEQARgBKgJGORgBIgQIARABKAIoAygEMA0) Mon, Dec 7 - Wed, Dec 9 · PIT · STL · Roundtrip [Select American Airlines flight, departing Mon, Dec 7 from Pittsburgh to St. Louis, returning Wed, Dec 9, priced at CA $443 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:07/12/2026TANYT&leg2=from:STL,to:PIT,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:442.30&airProductToken=AQpnCjIIwYIBEgQyNTcyGI-aASCuHCjRmZ8DMNGanwM4QkAAWAFqBUJBU0lDcghRVkFJWFNCWAoxCMGCARIEMzA2ORiuHCDyXCiXm58DMOqbnwM4QkABWAFqBUJBU0lDcghRVkFJWFNCWApmCjEIwYIBEgQxOTI2GPJcIK4cKMeqnwMwpKufAzhCQABYAWoFQkFTSUNyCE9WQUlVU0JWCjEIwYIBEgM5ODYYrhwgj5oBKPWsnwMw2q2fAzhCQAFYAWoFQkFTSUNyCE9WQUlVU0JWEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) Mon, Dec 7 - Wed, Dec 9 · PIT · STL · Roundtrip [Select American Airlines flight, departing Mon, Dec 7 from Pittsburgh to St. Louis, returning Wed, Dec 9, priced at CA $450 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:07/12/2026TANYT&leg2=from:STL,to:PIT,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:449.90&airProductToken=AQpnCjIIwYIBEgQyNTcyGI-aASCuHCjRmZ8DMNGanwM4QkAAWAFqBUJBU0lDcghRVkFJWFNCWAoxCMGCARIEMzA2ORiuHCDyXCiXm58DMOqbnwM4QkABWAFqBUJBU0lDcghRVkFJWFNCWBIKCAEQARgBKgJBQRgBIgQIARABKAIoAygEMAs) Mon, Dec 7 - Wed, Dec 9 · PIT · STL · Roundtrip [Select American Airlines flight, departing Mon, Dec 7 from Pittsburgh to St. Louis, returning Wed, Dec 9, priced at CA $471 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:07/12/2026TANYT&leg2=from:STL,to:PIT,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:470.20&airProductToken=AQpnCjIIwYIBEgQyNTcyGI-aASCuHCjRmZ8DMNGanwM4QkAAWAFqBUJBU0lDcghRVkFJWFNCWAoxCMGCARIEMzA2ORiuHCDyXCiXm58DMOqbnwM4QkABWAFqBUJBU0lDcghRVkFJWFNCWAplCjAIwYIBEgQ0NDU4GPJcIEMohqyfAzCErZ8DOEJAAFgBagVCQVNJQ3IIUVZBSVhTQlgKMQjBggESBDQzNTgYQyCPmgEo-a2fAzDKrp8DOEJAAVgBagVCQVNJQ3IIUVZBSVhTQlgSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) Mon, Dec 7 - Wed, Dec 9 · PIT · STL · Roundtrip [Select American Airlines flight, departing Mon, Dec 7 from Pittsburgh to St. Louis, returning Wed, Dec 9, priced at CA $500 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:07/12/2026TANYT&leg2=from:STL,to:PIT,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:499.30&airProductToken=AQpnCjIIwYIBEgQyNTcyGI-aASCuHCjRmZ8DMNGanwM4QkAAWAFqBUJBU0lDcghRVkFJWFNCWAoxCMGCARIEMzA2ORiuHCDyXCiXm58DMOqbnwM4QkABWAFqBUJBU0lDcghRVkFJWFNCWApnCjEIwYIBEgQzNDg0GPJcIK4cKKqvnwMwgbCfAzhCQABYAWoFQkFTSUNyCE5WQUlVU0JYCjIIwYIBEgQ0MzYzGK4cII-aASj0sJ8DMNyxnwM4QkABWAFqBUJBU0lDcghOVkFJVVNCWBIKCAEQARgBKgJBQRgBIgQIARABKAIoAygEMAs) Mon, Dec 7 - Wed, Dec 9 · PIT · STL · Roundtrip [Select Delta flight, departing Mon, Dec 7 from Pittsburgh to St. Louis, returning Wed, Dec 9, priced at CA $609 Found 1 day ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:07/12/2026TANYT&leg2=from:STL,to:PIT,departure:09/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:608.90&airProductToken=AQpvCjYIxJgBEgQzMTIyGI-aASDgXCi7mZ8DMLKanwM4RUAAWAFqCU1BSU5CQVNJQ3IIVEFWVEE2QkMKNQjEmAESBDE0MDMY4Fwg8lwohJufAzDtm58DOEVAAVgBaglNQUlOQkFTSUNyCFRBVlRBNkJDEgoIARABGAEqAkRMGAEiBAgBEAEoAigDKAQwAQ) Mon, Dec 7 - Wed, Dec 9 · PIT · STL · Roundtrip [Select Alaska Airlines flight, departing Fri, Nov 20 from Pittsburgh to St. Louis, returning Sun, Nov 22, priced at CA $2,423 Found 3 days ago](https://www.expedia.ca/Flights-Search?leg1=from:PIT,to:STL,departure:20/11/2026TANYT&leg2=from:STL,to:PIT,departure:22/11/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&flp=mdl:flights-flex-module,price:2422.20&airProductToken=AQpfCi4IwaYBEgMzOTQYj5oBIJIBKNjUnQMwoNedAzhYQABYAWoCU1ZyCEtIN09BU0JOCi0IwaYBEgM2NDcYkgEg8lwo4NqdAzDH3J0DOFhAAVgBagJTVnIIVkg3T0FTQk4SCggBEAEYASoCQVMYASIECAEQASgCKAMoBDAB) Fri, Nov 20 - Sun, Nov 22 · PIT · STL · Roundtrip ## Find the cheapest month to fly from Pittsburgh (PIT) to St. Louis (STL) ### August is typically the cheapest month to fly From CA $274 - CA $1,478 per traveller. View flights in August Insights are based on prices from searches for economy trips of 10 days or less on our sites in the last 12 months. Insights are informative only and current prices may differ. ## Book with confidence ### Pittsburgh to St. Louis Flights #### The easy way to book your flights from Pittsburgh to St. Louis With Expedia, it’s simple to find and book flights to St. Louis from Pittsburgh whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 6 airlines that cover this route. There are nonstop flights to Lambert-St. Louis Intl., too. Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Pittsburgh to St. Louis today, tomorrow, or this week. #### Save dollars with cheap flights from Pittsburgh Intl., PIT to Lambert-St. Louis Intl., STL Sort your search results by price to find great deals on your flight from Pittsburgh to St. Louis—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to St. Louis from Pittsburgh currently is just CA $374 rising to CA $2,423\. Here are more money-saving tips: - Fly in December when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to St. Louis - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! #### Reasons to choose Expedia for your flight to St. Louis from Pittsburgh Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to St. Louis with Expedia today. ## Frequently Asked Questions ### How much does a flight from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost? You can find one-way and return flights from PIT to STL with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when PIT to STL ticket fares go up or down. ### What is the cheapest month to fly from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? The cheapest months to fly from PIT to STL are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route. ### Which airlines fly direct from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? Only one airline offers direct flights from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.). Southwest Airlines operates 13 direct flights from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) every week. ### How do I find cheap flights from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? To find a cheap flight from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up [Price Tracking](https://www.expedia.ca/why/price-tracking) and receive alerts when fares go up or down. ### What is the best airline to fly with from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? The best airline to fly with from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access. ### What is the best time to fly from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience. ### How many flights per day from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? You'll find approximately 2 nonstop flights per day from Pittsburgh Intl. (PIT) to Lambert-St. Louis Intl. (STL). For even more choices, look at flights that include layovers, as there are around 82 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and Orlando Intl. (MCO). ### What is the earliest flight from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? The earliest flight from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically departs around 5:00 AM. This service is offered by American Airlines. This is a seasonal service, active in January and December. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search. ### What day of the week has the most flights from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? You'll find the most flights from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) on Fridays, with around 59 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and United. Fridays offer notably more flight options compared to other days of the week, making it a convenient day to travel. ### What are the most popular departure times for flights from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? The most popular departure times for flights from Pittsburgh Intl. (PIT) to Lambert-St. Louis Intl. (STL) are in the early morning, from 6am to 9am. Many major carriers, including American Airlines, Southwest Airlines and United, offer flights during this window. Many travellers prefer these times as it allows them to arrive at their destination early in the day, giving them more time for business or leisure activities. ### How long does it take to fly from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? A nonstop flight from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically takes around 1 hour 48 minutes, covering a distance of approximately 887 kilometers. If you opt for a one-stop flight, your travel time will be longer, usually around 6 hours 18 minutes. Flights with two or more stops can take significantly longer, often around 9 hours. Keep in mind that actual flight times can vary due to factors like routing, weather, and wind patterns. ### Can you fly business or first class from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? You can fly business class or first class between PIT and STL. You can fly business class with Frontier Airlines and Delta. First class cabins are available on Alaska Airlines, United, Delta, and American Airlines. ### How do I earn miles on a Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia? It's easy to earn miles on a Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of [One Key™](https://www.expedia.ca/welcome-one-key), you can also earn OneKeyCash™\* on top of your airline miles when you book with Expedia. \*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands. ### What airports do you fly into for St. Louis, MO (STL) from Pittsburgh, PA (PIT)? If you're planning to travel to St. Louis from Pittsburgh Intl. (PIT), you can fly directly into Lambert-St. Louis Intl. (STL). Some flights may connect through major hubs like Baltimore Washington Intl. Thurgood Marshall (BWI), Midway Intl. (MDW), or Nashville Intl. (BNA) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans. ### Is it cheaper to buy a plane ticket from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute? Typically, booking a last minute flight from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare. ### Is it cheaper to book a Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package? Securing a Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) [flight and hotel package](https://www.expedia.ca/st-louis.d178309.destination-travel-guides) is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars. ### Can I cancel or change the date of my flight from Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)? If you booked your Pittsburgh, PA (PIT-Pittsburgh Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in [your itinerary](https://www.expedia.ca/trips) or confirmation email. Or, head to our [Customer Service portal](https://www.expedia.ca/helpcenter/) if you'd like more information. ## Travel information | Origin airport | Pittsburgh International Airport | | ------------------- | ---------------------------------------------------------------------------------------- | | Destination airport | Lambert-St. Louis International Airport | | Distance | 887 km away | | Airlines serving | American Airlines, Delta, United, Southwest Airlines, Alaska Airlines, Frontier Airlines | | Popular airline | American Airlines | | Roundtrip price | CA $374 | | Average flight time | 1 hour 54 mins | ## Explore a world of travel with Expedia - [Flights](?equalTargetTab=tab-0) - [Flights from Toronto (YTO) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yto/stl/toronto-to-st-louis) - [Flights from Washington (DCA) to St. Louis (STL)](https://www.expedia.ca/lp/flights/dca/stl/washington-to-st-louis) - [Flights from Newark Liberty Intl. Airport (EWR) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ewr/stl/newark-liberty-intl-airport-to-st-louis) - [Flights from International Falls (INL) to St. Louis (STL)](https://www.expedia.ca/lp/flights/inl/stl/international-falls-to-st-louis) - [Flights from Winnipeg (YWG) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ywg/stl/winnipeg-to-st-louis) - [Flights from Sudbury (YSB) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ysb/stl/sudbury-to-st-louis) - [Flights from New York (LGA) to St. Louis (STL)](https://www.expedia.ca/lp/flights/lga/stl/new-york-to-st-louis) - [Flights from Regina (YQR) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yqr/stl/regina-to-st-louis) - [Flights from Ottawa (YOW) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yow/stl/ottawa-to-st-louis) - [Flights from San Francisco (SFO) to St. Louis (STL)](https://www.expedia.ca/lp/flights/sfo/stl/san-francisco-to-st-louis) - [Flights from Portland (PDX) to St. Louis (STL)](https://www.expedia.ca/lp/flights/pdx/stl/portland-to-st-louis) - [Flights from Rochester (ROC) to St. Louis (STL)](https://www.expedia.ca/lp/flights/roc/stl/rochester-to-st-louis) - [Flights from St. John's (YYT) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yyt/stl/st-johns-to-st-louis) - [Flights from Kitchener (YKF) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ykf/stl/kitchener-to-st-louis) - [Flights from New Orleans (MSY) to St. Louis (STL)](https://www.expedia.ca/lp/flights/msy/stl/new-orleans-to-st-louis) - [Flights from Thunder Bay (YQT) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yqt/stl/thunder-bay-to-st-louis) - [Flights from Hamilton (HLT) to St. Louis (STL)](https://www.expedia.ca/lp/flights/hlt/stl/hamilton-to-st-louis) - [Flights from Burlington (BTV) to St. Louis (STL)](https://www.expedia.ca/lp/flights/btv/stl/burlington-to-st-louis) - [Flights from Great Falls (GTF) to St. Louis (STL)](https://www.expedia.ca/lp/flights/gtf/stl/great-falls-to-st-louis) - [Flights from Ogdensburg (OGS) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ogs/stl/ogdensburg-to-st-louis) - [Flights from San Antonio (SAT) to St. Louis (STL)](https://www.expedia.ca/lp/flights/sat/stl/san-antonio-to-st-louis) - [Flights from Saint John (YSJ) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ysj/stl/saint-john-to-st-louis) - [Flights from Kamloops (YKA) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yka/stl/kamloops-to-st-louis) - [Flights from Nashville (BNA) to St. Louis (STL)](https://www.expedia.ca/lp/flights/bna/stl/nashville-to-st-louis) - [Flights from Bangor (BGR) to St. Louis (STL)](https://www.expedia.ca/lp/flights/bgr/stl/bangor-to-st-louis) - [Flights from Montreal (YUL) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yul/stl/montreal-to-st-louis) - [Flights from Kelowna (YLW) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ylw/stl/kelowna-to-st-louis) - [Flights from Fredericton (YFC) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yfc/stl/fredericton-to-st-louis) - [Flights from Miami (MIA) to St. Louis (STL)](https://www.expedia.ca/lp/flights/mia/stl/miami-to-st-louis) - [Flights from Austin (AUS) to St. Louis (STL)](https://www.expedia.ca/lp/flights/aus/stl/austin-to-st-louis) - [Flights from Kalispell (FCA) to St. Louis (STL)](https://www.expedia.ca/lp/flights/fca/stl/kalispell-to-st-louis) - [Flights from Plattsburgh (PBG) to St. Louis (STL)](https://www.expedia.ca/lp/flights/pbg/stl/plattsburgh-to-st-louis) - [Flights from Abbotsford (YXX) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yxx/stl/abbotsford-to-st-louis) - [Flights from Syracuse (SYR) to St. Louis (STL)](https://www.expedia.ca/lp/flights/syr/stl/syracuse-to-st-louis) - [Flights from Delhi (DEL) to St. Louis (STL)](https://www.expedia.ca/lp/flights/del/stl/delhi-to-st-louis) - [Flights from Dallas (DFW) to St. Louis (STL)](https://www.expedia.ca/lp/flights/dfw/stl/dallas-to-st-louis) - [Flights from Grande Prairie (YQU) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yqu/stl/grande-prairie-to-st-louis) - [Flights from New York (JFK) to St. Louis (STL)](https://www.expedia.ca/lp/flights/jfk/stl/new-york-to-st-louis) - [Flights from Toronto (YYZ) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yyz/stl/toronto-to-st-louis) - [Flights from Los Angeles (LAX) to St. Louis (STL)](https://www.expedia.ca/lp/flights/lax/stl/los-angeles-to-st-louis) - [Flights from Denver (DEN) to St. Louis (STL)](https://www.expedia.ca/lp/flights/den/stl/denver-to-st-louis) - [Flights from Atlanta (ATL) to St. Louis (STL)](https://www.expedia.ca/lp/flights/atl/stl/atlanta-to-st-louis) - [Flights from Wichita (ICT) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ict/stl/wichita-to-st-louis) - [Flights from Flint (FNT) to St. Louis (STL)](https://www.expedia.ca/lp/flights/fnt/stl/flint-to-st-louis) - [Flights from Duluth (DLH) to St. Louis (STL)](https://www.expedia.ca/lp/flights/dlh/stl/duluth-to-st-louis) - [Flights from Dakar (DKR) to St. Louis (STL)](https://www.expedia.ca/lp/flights/dkr/stl/dakar-to-st-louis) - [Flights from Timmins (YTS) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yts/stl/timmins-to-st-louis) - [Flights from Grand Rapids (GRR) to St. Louis (STL)](https://www.expedia.ca/lp/flights/grr/stl/grand-rapids-to-st-louis) - [Flights from Indianapolis (IND) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ind/stl/indianapolis-to-st-louis) - [Flights from Halifax (YHZ) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yhz/stl/halifax-to-st-louis) - [Flights from Bellingham (BLI) to St. Louis (STL)](https://www.expedia.ca/lp/flights/bli/stl/bellingham-to-st-louis) - [Flights from Hamilton (YHM) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yhm/stl/hamilton-to-st-louis) - [Flights from Victoria (YYJ) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yyj/stl/victoria-to-st-louis) - [Flights from Nanaimo (YCD) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ycd/stl/nanaimo-to-st-louis) - [Flights from Detroit (DTW) to St. Louis (STL)](https://www.expedia.ca/lp/flights/dtw/stl/detroit-to-st-louis) - [Flights from Kansas City (MCI) to St. Louis (STL)](https://www.expedia.ca/lp/flights/mci/stl/kansas-city-to-st-louis) - [Flights from Kingston (KIN) to St. Louis (STL)](https://www.expedia.ca/lp/flights/kin/stl/kingston-to-st-louis) - [Flights from Saskatoon (YXE) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yxe/stl/saskatoon-to-st-louis) - [Flights from Columbus (CMH) to St. Louis (STL)](https://www.expedia.ca/lp/flights/cmh/stl/columbus-to-st-louis) - [Flights from Memphis (MEM) to St. Louis (STL)](https://www.expedia.ca/lp/flights/mem/stl/memphis-to-st-louis) - [Flights from Philadelphia (PHL) to St. Louis (STL)](https://www.expedia.ca/lp/flights/phl/stl/philadelphia-to-st-louis) - [Flights from Niagara Falls (IAG) to St. Louis (STL)](https://www.expedia.ca/lp/flights/iag/stl/niagara-falls-to-st-louis) - [Flights from Lethbridge (YQL) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yql/stl/lethbridge-to-st-louis) - [Flights from Sarasota (SRQ) to St. Louis (STL)](https://www.expedia.ca/lp/flights/srq/stl/sarasota-to-st-louis) - [Flights from Sarnia (YZR) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yzr/stl/sarnia-to-st-louis) - [Flights from Baltimore (BWI) to St. Louis (STL)](https://www.expedia.ca/lp/flights/bwi/stl/baltimore-to-st-louis) - [Flights from Windsor (YQG) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yqg/stl/windsor-to-st-louis) - [Flights from Houston (IAH) to St. Louis (STL)](https://www.expedia.ca/lp/flights/iah/stl/houston-to-st-louis) - [Flights from Sault Ste. Marie (SSM) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ssm/stl/sault-ste-marie-to-st-louis) - [Flights from Buffalo (BUF) to St. Louis (STL)](https://www.expedia.ca/lp/flights/buf/stl/buffalo-to-st-louis) - [Flights from Boston (BOS) to St. Louis (STL)](https://www.expedia.ca/lp/flights/bos/stl/boston-to-st-louis) - [Flights from Grand Forks (GFK) to St. Louis (STL)](https://www.expedia.ca/lp/flights/gfk/stl/grand-forks-to-st-louis) - [Flights from Chicago (ORD) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ord/stl/chicago-to-st-louis) - [Flights from Cranbrook (YXC) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yxc/stl/cranbrook-to-st-louis) - [Flights from Cincinnati (CVG) to St. Louis (STL)](https://www.expedia.ca/lp/flights/cvg/stl/cincinnati-to-st-louis) - [Flights from Toronto (YTZ) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ytz/stl/toronto-to-st-louis) - [Flights from Minot (MOT) to St. Louis (STL)](https://www.expedia.ca/lp/flights/mot/stl/minot-to-st-louis) - [Flights from Ontario Intl. Airport (ONT) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ont/stl/ontario-to-st-louis) - [Flights from London (YXU) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yxu/stl/london-to-st-louis) - [Flights from Sault Ste. Marie (CIU) to St. Louis (STL)](https://www.expedia.ca/lp/flights/ciu/stl/sault-ste-marie-to-st-louis) - [Flights from Fort Saint John (YXJ) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yxj/stl/fort-saint-john-to-st-louis) - [Flights from Phoenix (PHX) to St. Louis (STL)](https://www.expedia.ca/lp/flights/phx/stl/phoenix-to-st-louis) - [Flights from Las Vegas (LAS) to St. Louis (STL)](https://www.expedia.ca/lp/flights/las/stl/las-vegas-to-st-louis) - [Flights from Waterloo (ALO) to St. Louis (STL)](https://www.expedia.ca/lp/flights/alo/stl/waterloo-to-st-louis) - [Flights from Calgary (YYC) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yyc/stl/calgary-to-st-louis) - [Flights from Vancouver (YVR) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yvr/stl/vancouver-to-st-louis) - [Flights from Charlottetown Alexander B. Campbell Airport (YYG) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yyg/stl/charlottetown-to-st-louis) - [Flights from Moncton (YQM) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yqm/stl/moncton-to-st-louis) - [Flights from San Diego (SAN) to St. Louis (STL)](https://www.expedia.ca/lp/flights/san/stl/san-diego-to-st-louis) - [Flights from Orange County (SNA) to St. Louis (STL)](https://www.expedia.ca/lp/flights/sna/stl/orange-county-to-st-louis) - [Flights from Seattle (SEA) to St. Louis (STL)](https://www.expedia.ca/lp/flights/sea/stl/seattle-to-st-louis) - [Flights from Québec (YQB) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yqb/stl/quebec-to-st-louis) - [Flights from Salt Lake City (SLC) to St. Louis (STL)](https://www.expedia.ca/lp/flights/slc/stl/salt-lake-city-to-st-louis) - [Flights from Spokane (GEG) to St. Louis (STL)](https://www.expedia.ca/lp/flights/geg/stl/spokane-to-st-louis) - [Flights from Edmonton (YEG) to St. Louis (STL)](https://www.expedia.ca/lp/flights/yeg/stl/edmonton-to-st-louis) - [Flights from Minneapolis (MSP) to St. Louis (STL)](https://www.expedia.ca/lp/flights/msp/stl/minneapolis-to-st-louis) - [Flights from Lagos (LOS) to St. Louis (STL)](https://www.expedia.ca/lp/flights/los/stl/lagos-to-st-louis) - [Flights from Massena (MSS) to St. Louis (STL)](https://www.expedia.ca/lp/flights/mss/stl/massena-to-st-louis) - [Flights from Fargo (FAR) to St. Louis (STL)](https://www.expedia.ca/lp/flights/far/stl/fargo-to-st-louis) - [Flights from Cleveland (CLE) to St. Louis (STL)](https://www.expedia.ca/lp/flights/cle/stl/cleveland-to-st-louis) \*Available to Expedia members. ## Other language versions ```yaml hreflang: x-default: https://www.expedia.com/lp/flights/pit/stl/pittsburgh-to-st-louis zh-CN: https://www.expedia.com/cn/lp/flights/pit/stl/pittsburgh-to-st-louis fr-FR: https://www.expedia.fr/lp/vols/pit/stl/pittsburgh-a-st-louis es-MX: https://www.expedia.mx/lp/vuelos/pit/stl/pittsburgh-a-st-louis de-DE: https://www.expedia.de/lp/fluge/pit/stl/pittsburgh-nach-st-louis sv-SE: https://www.expedia.se/lp/flyg/pit/stl/pittsburgh-till-st-louis en-NZ: https://www.expedia.co.nz/lp/flights/pit/stl/pittsburgh-to-st-louis ar: https://www.expedia.sa/lp/flights/pit/stl/pittsburgh-to-st-louis en-CA: https://www.expedia.ca/lp/flights/pit/stl/pittsburgh-to-st-louis fr-CA: https://www.expedia.ca/fr/lp/vols/pit/stl/pittsburgh-a-st-louis ko-KR: https://www.expedia.co.kr/lp/flights/pit/stl/pittsburgh-to-st-louis ja-JP: https://www.expedia.co.jp/lp/flights/pit/stl/pittsburgh-to-st-louis nb-NO: https://www.expedia.no/lp/fly/pit/stl/pittsburgh-til-st-louis id-ID: https://www.expedia.co.id/lp/flights/pit/stl/pittsburgh-to-st-louis es: https://www.expedia.com/es/lp/vuelos/pit/stl/pittsburgh-a-st-louis en-IN: https://www.expedia.co.in/lp/flights/pit/stl/pittsburgh-to-st-louis en-GB: https://www.expedia.co.uk/lp/flights/pit/stl/pittsburgh-to-st-louis en-US: https://www.expedia.com/lp/flights/pit/stl/pittsburgh-to-st-louis en-TW: https://www.expedia.com.tw/en/lp/flights/pit/stl/pittsburgh-to-st-louis ```