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CA $186 Cheap Flights from St. Louis (STL) to Pittsburgh (PIT)

View CA $186 flight on Mon, Nov 23, 2026Opens in a new window

Popular airlines from Lambert-St. Louis International Airport (STL) to Pittsburgh International Airport (PIT)

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Cheap flights from St. Louis (STL) to Pittsburgh (PIT)

Prices were available within the past 7 days and start at CA $186 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from St. Louis (STL) to Pittsburgh (PIT)

January is typically the cheapest month to fly

From CA $228 - CA $551 per traveller.

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) cost?
You can find one-way and return flights from STL to PIT 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 STL to PIT ticket fares go up or down.
What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
September is typically the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.), with average return fares around CA$416. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other budget-friendly months to consider for your trip include February and December.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
Only one airline offers direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.). Southwest Airlines operates 13 direct flights from Lambert-St. Louis Intl. to Pittsburgh Intl. every week.
What is the cheapest airline that flies from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
Southwest Airlines is one of the cheapest airlines offering nonstop return flights from Lambert-St. Louis Intl. (STL) to Pittsburgh Intl. (PIT), with tickets starting from around CA$299 for flights that can be booked for departure within the next year. Frontier Airlines is one of the cheapest airlines offering connecting return flights on this route, with tickets starting from around CA$303. These prices are per adult in economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh 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 and receive alerts when fares go up or down.
What is the best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
The best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
The cheapest months to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) are typically September and December, with average return flights costing around CA$416. These months can offer good value, especially if you're looking to travel before the holiday rush in December or enjoy the early autumn in September.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
You'll find approximately 2 nonstop flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.). For even more choices, look at flights that include layovers, as there are around 77 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and Charlotte-Douglas Intl. (CLT).
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
The earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) typically departs around 5:00 AM. This service is offered by American Airlines. Please note that this is a seasonal service, active only in November. An early departure like this can be great for maximizing 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
You'll typically find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) on a Friday, with around 60 flights available. This gives you a good selection of options if you're planning a weekend getaway or a business trip. 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 popular choice for travellers.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
The most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) 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 to get an early start on their day at their destination.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
A nonstop flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) typically takes around 1 hour 30 minutes. This route covers a distance of approximately 887 kilometres. If you opt for a flight with one stop, your travel time will be longer, usually around 4 hours 48 minutes. Flights with two or more stops can take even longer, averaging about 8 hours. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
Yes, you can fly business class or first class between STL and PIT. You can fly business class with Frontier Airlines and Delta.First class cabins are available on Alaska Airlines, Delta, United, and American Airlines.
How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh 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™, 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 Pittsburgh, PA (PIT) from St. Louis, MO (STL)?
If you're planning to travel to Pittsburgh from Lambert-St. Louis Intl. (STL), you can fly directly into Pittsburgh Intl. (PIT). Some flights may connect through major hubs like O'Hare Intl. (ORD), Charlotte-Douglas Intl. (CLT), or Hartsfield-Jackson Atlanta Intl. (ATL) before reaching Pittsburgh. 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.) flight and hotel package 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh Intl.)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Pittsburgh, PA (PIT-Pittsburgh 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 or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Pittsburgh Intl.
Distance
881 km
Average flight time
3 hours 31 mins

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St. Louis to Pittsburgh Flights

The easy way to book your flights from St. Louis to Pittsburgh 

With Expedia, it’s simple to find and book flights to Pittsburgh from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Pittsburgh 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 St. Louis to Pittsburgh today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Pittsburgh Intl., PIT 

Sort your search results by price to find great deals on your flight from St. Louis to Pittsburgh—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Pittsburgh from St. Louis currently is just rising to .  

Here are more money-saving tips: 

  • Fly in when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Pittsburgh  
  • 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 Pittsburgh from St. Louis 

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 Pittsburgh with Expedia today.

St. Louis to Pittsburgh Flights

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