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CA $208 Cheap Flights from Baltimore (BWI) to St. Louis (STL)

View CA $208 flight on Thu, Aug 27, 2026Opens in a new window

Popular airlines from Baltimore Washington International Airport (BWI) to Lambert-St. Louis International Airport (STL)

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Cheap flights from Baltimore (BWI) to St. Louis (STL)

Prices were available within the past 7 days and start at CA $208 for one-way flights and CA $415 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Aug 27 - Thu, Sep 3
BWI
Baltimore
STL
St. Louis
CA $415 Roundtrip, found 1 day ago
CA $415
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Aug 27 from Baltimore to St. Louis, returning Thu, Sep 3, priced at CA $415 found 1 day ago
Delta
Thu, Aug 27 - Thu, Sep 3
BWI
Baltimore
STL
St. Louis
CA $415 Roundtrip, found 1 day ago
CA $415
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Aug 27 from Baltimore to St. Louis, returning Thu, Sep 3, priced at CA $415 found 1 day ago
Delta
Sat, Aug 22 - Tue, Aug 25
BWI
Baltimore
STL
St. Louis
CA $424 Roundtrip, found 3 days ago
CA $424
Roundtrip
found 3 days ago
Select Delta flight, departing Sat, Aug 22 from Baltimore to St. Louis, returning Tue, Aug 25, priced at CA $424 found 3 days ago
Delta
Tue, Aug 18 - Wed, Aug 19
BWI
Baltimore
STL
St. Louis
CA $428 Roundtrip, found 3 days ago
CA $428
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 18 from Baltimore to St. Louis, returning Wed, Aug 19, priced at CA $428 found 3 days ago
American Airlines
Wed, Aug 19 - Sat, Aug 22
BWI
Baltimore
STL
St. Louis
CA $433 Roundtrip, found 3 days ago
CA $433
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Aug 19 from Baltimore to St. Louis, returning Sat, Aug 22, priced at CA $433 found 3 days ago
American Airlines
Thu, Aug 27 - Thu, Sep 3
BWI
Baltimore
STL
St. Louis
CA $460 Roundtrip, found 1 day ago
CA $460
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Aug 27 from Baltimore to St. Louis, returning Thu, Sep 3, priced at CA $460 found 1 day ago
Delta
Thu, Aug 27 - Thu, Sep 3
BWI
Baltimore
STL
St. Louis
CA $461 Roundtrip, found 1 day ago
CA $461
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Aug 27 from Baltimore to St. Louis, returning Thu, Sep 3, priced at CA $461 found 1 day ago
Delta
Fri, Aug 21 - Tue, Aug 25
BWI
Baltimore
STL
St. Louis
CA $464 Roundtrip, found 3 days ago
CA $464
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Aug 21 from Baltimore to St. Louis, returning Tue, Aug 25, priced at CA $464 found 3 days ago
United
Wed, Aug 19 - Sat, Aug 22
BWI
Baltimore
STL
St. Louis
CA $544 Roundtrip, found 3 days ago
CA $544
Roundtrip
found 3 days ago
Select United flight, departing Wed, Aug 19 from Baltimore to St. Louis, returning Sat, Aug 22, priced at CA $544 found 3 days ago
Alaska Airlines
Wed, Aug 12 - Mon, Aug 17
BWI
Baltimore
STL
St. Louis
CA $1,943 Roundtrip, found 1 day ago
CA $1,943
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Aug 12 from Baltimore to St. Louis, returning Mon, Aug 17, priced at CA $1,943 found 1 day ago

Frequently asked questions

How much does a flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find one-way and return flights from BWI 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 BWI to STL ticket fares go up or down.
What is the cheapest month to fly from Baltimore, MD (BWI) to St. Louis, MO (STL)?
The cheapest months to fly from Baltimore, MD (BWI) to St. Louis, MO (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 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Only one airline offers direct flights from Baltimore Washington Intl. Thurgood Marshall (BWI) to Lambert-St. Louis Intl. (STL). Southwest Airlines operates 28 direct flights from BWI to STL every week.
How do I find cheap flights from Baltimore, MD (BWI) to St. Louis, MO (STL)?
To find a cheap flight from Baltimore, MD (BWI) to St. Louis, MO (STL), 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 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) 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 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) 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 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly from Baltimore Washington International Thurgood Marshall (BWI) to Lambert-St. Louis International (STL) is typically September or May. These months offer a great balance—prices are reasonable at around CA$420 for a return flight, and you'll have plenty of flight options since they're popular times to travel. If you're flexible, these months give you both affordable fares and excellent flight schedules to work with.
How many flights per day from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll find around 4 nonstop flights per day from Baltimore Washington Intl. Thurgood Marshall (BWI) to Lambert-St. Louis Intl. (STL). For even more choices, look at flights that include layovers, as there are approximately 138 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 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Baltimore Washington Intl. Thurgood Marshall (BWI) to Lambert-St. Louis Intl. (STL) typically departs around 5:00 AM. This flight is operated by American Airlines. This is a seasonal service, active only in 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 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll typically find the most flights from Baltimore Washington Intl. Thurgood Marshall (BWI) to Lambert-St. Louis Intl. (STL) on a Friday, with around 76 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, Delta, and American Airlines. Fridays offer notably more flight options compared to other days of the week, making it a great day to consider for your journey.
What are the most popular departure times for flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Baltimore Washington Intl. Thurgood Marshall (BWI) to Lambert-St. Louis Intl. (STL) are in the early morning, from 6am to 9am. Many major carriers, including Southwest Airlines, Delta and United, offer flights during this window. Many travellers prefer this because it allows for an early start to their day in St. Louis.
How long does it take to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A non-stop flight from Baltimore Washington Intl. Thurgood Marshall (BWI) to Lambert-St. Louis Intl. (STL) typically takes around 2 hours 18 minutes, covering a distance of approximately 1,184 kilometers. If you opt for a one-stop flight, your journey will usually take longer, averaging about 7 hours. Flights with two or more stops will extend your travel time further, typically to around 9 hours 48 minutes. 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 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Yes, you can fly business class or first class between BWI and STL. Airlines that offer business class service on this route include:
  • Frontier Airlines
  • Delta
First class cabins are available on Alaska Airlines, Delta, United, and American Airlines.
How do I earn miles on a Baltimore, MD (BWI) to St. Louis, MO (STL) flight with Expedia?
It's easy to earn miles on a Baltimore, MD (BWI) to St. Louis, MO (STL) 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 St. Louis, MO (STL) from Baltimore, MD (BWI)?
If you're planning to travel to St. Louis from Baltimore Washington Intl. Thurgood Marshall (BWI), you can fly directly into Lambert-St. Louis Intl. (STL). Some flights may connect through major hubs like Myrtle Beach International Airport (MYR), Charlotte-Douglas Intl. (CLT), or Buffalo Niagara Intl. (BUF) 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 Baltimore, MD (BWI) to St. Louis, MO (STL) at the last minute?
Typically, booking a last minute flight from Baltimore, MD (BWI) to St. Louis, MO (STL) 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 Baltimore, MD (BWI) to St. Louis, MO (STL) flight and hotel package?
Securing a Baltimore, MD (BWI) to St. Louis, MO (STL) 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 Baltimore, MD (BWI) to St. Louis, MO (STL)?
If you booked your Baltimore, MD (BWI) to St. Louis, MO (STL) 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
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta
Roundtrip price
CA $415
Distance
1177 km
Average flight time
1 hour 13 mins

Book with confidence

Baltimore to St. Louis Flights

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

With Expedia, it’s simple to find and book flights to St. Louis from Baltimore 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 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 Baltimore to St. Louis today, tomorrow, or this week.  

 

Save dollars with cheap flights from Baltimore Washington Intl. Thurgood Marshall, BWI to Lambert-St. Louis Intl., STL 

Sort your search results by price to find great deals on your flight from Baltimore to St. Louis—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to St. Louis from Baltimore currently is just CA $415 rising to CA $1,943.  

Here are more money-saving tips: 

  • Fly in August 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 Baltimore 

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.

Baltimore to St. Louis Flights

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