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

View AU$176 flight on Thu, 28 May 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 for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$527 Return, found 5 days ago
AU$527
Return
found 5 days ago
Select American Airlines flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$527 found 5 days ago
United
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$542 Return, found 5 days ago
AU$542
Return
found 5 days ago
Select United flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$542 found 5 days ago
Delta
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$552 Return, found 5 days ago
AU$552
Return
found 5 days ago
Select Delta flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$552 found 5 days ago
American Airlines
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$563 Return, found 5 days ago
AU$563
Return
found 5 days ago
Select American Airlines flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$563 found 5 days ago
American Airlines
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$570 Return, found 5 days ago
AU$570
Return
found 5 days ago
Select American Airlines flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$570 found 5 days ago
United
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$577 Return, found 5 days ago
AU$577
Return
found 5 days ago
Select United flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$577 found 5 days ago
United
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$591 Return, found 5 days ago
AU$591
Return
found 5 days ago
Select United flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$591 found 5 days ago
United
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$598 Return, found 5 days ago
AU$598
Return
found 5 days ago
Select United flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$598 found 5 days ago
American Airlines
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$602 Return, found 5 days ago
AU$602
Return
found 5 days ago
Select American Airlines flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$602 found 5 days ago
American Airlines
Sat, 6 June - Sat, 13 June
BWI
Baltimore
STL
St. Louis
AU$606 Return, found 5 days ago
AU$606
Return
found 5 days ago
Select American Airlines flight, departing Sat, 6 June from Baltimore to St. Louis, returning Sat, 13 June, priced at AU$606 found 5 days ago

Frequently asked questions

What is the cheapest month to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
September is typically the cheapest month to fly from Baltimore Washington Intl. Thurgood Marshall (BWI) to Lambert-St. Louis Intl. (STL), with average return fares around 760 AUD. This is about 20% lower than the average price throughout the year. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other cheap months to fly from BWI to STL include May and August.
Which airlines fly direct from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Enter BWI to STL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) 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 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 traveller to traveller. If you like to fly early, WN offers early morning flights. If price is the most important factor, WN typically offers the lowest fares. WN 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) for a good balance of price and availability is typically September or May. Based on booking data from the past year, you can expect average return flight prices around 760 AUD during these months. These periods often offer a good selection of flights, allowing you to find a schedule that suits your travel plans.
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 approximately 4 nonstop flights per day from Baltimore Washington Intl. Thurgood Marshall (BWI) to Lambert-St. Louis Intl. (STL). For even more choice, look at flights that include layovers, as there are around 142 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 at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active 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 Thursday, with around 70 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, Delta Air Lines, and American Airlines. Flight schedules are consistent throughout the week, with only a slight variation in the number of flights.
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. Around 26% of passengers reckon this time window's best. Heaps of major carriers, including Southwest Airlines and Delta Air Lines, offer flights during this window. These early morning flights are often preferred by business travellers or those who want to arrive at their destination with plenty of time to spare.
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.)?
Flying nonstop from BWI to STL takes around 2 hours 20 minutes, with the route covering approximately 736 miles. Flights with a layover typically take 4 hours 40 minutes longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, 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.)?
Select the "Business class" and "First class" filters when looking for BWI to STL flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) 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™, 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 from Baltimore Washington Intl. Thurgood Marshall (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 MYR (MYR), Charlotte-Douglas Intl. (CLT), 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-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) 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 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis 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 Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) 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 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
American Airlines, Delta, United
Return price
AU$526
Distance
1177 km
Average flight time
1 hour 52 mins

Book with confidence

Your quick guide to flights from Baltimore to St. Louis

Pick up great flights from Baltimore to St. Louis

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Baltimore to St. Louis. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Baltimore to St. Louis that take around hours.

Find cheap flights from Baltimore to St. Louis

From the great flight deals with prices currently ranging from AU$527 to AU$606, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Baltimore to St. Louis around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to St. Louis is normally in June.

Reasons to book your flight from Baltimore to St. Louis with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Baltimore to St. Louis across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to St. Louis right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from Baltimore to St. Louis

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