St. Louis

$55+ Cheap flights from Baltimore to St. Louis (BWI - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — STL
Jan 21 — Jan 281
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The best prices from Baltimore/Washington to Lambert-St Louis are usually found in March or October, booked 83 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Baltimore to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Baltimore (BWI) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$120
(FlightHub)

One-way from

$55
(Frontier)

Popular in

May

Cheapest in

March

Average price

$377
Provider with most accurate pricing for Baltimore/Washington-Lambert-St Louis flight deals.
Provider most trusted by Cheapflights users for Baltimore/Washington-Lambert-St Louis flights.
From Baltimore/Washington to Lambert-St Louis
One-way flight from Baltimore/Washington to Lambert-St Louis
High demand for flights, 10% potential price rise
Best time to find cheap flights, 2% potential price drop
Average for round-trip flights in January 2025

Find flight deals from Baltimore to St. Louis

Cheapest flights from Baltimore to St. Louis
Explore the most affordable flight options available from Baltimore to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 16, 2025.

This FlightHub deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/309:20 pmBWI - STL
1 stop27h 11mFrontier
Sat 2/15:05 pmSTL - BWI
1 stop13h 46mFrontier
Deal found 1/14$120
This Justfly.com deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/410:10 amBWI - STL
1 stop14h 21mMultiple Airlines
Thu 2/64:28 pmSTL - BWI
1 stop6h 31mMultiple Airlines
Deal found 1/15$148
This FlightHub deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/275:25 amBWI - STL
1 stop10h 17mSpirit Airlines
Sun 3/24:00 pmSTL - BWI
1 stop16h 43mSpirit Airlines
Deal found 1/16$176
This KAYAK deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/102:01 pmBWI - STL
1 stop7h 00mDelta
Tue 2/116:00 amSTL - BWI
1 stop5h 56mDelta
Deal found 1/16$206
This United Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2910:05 amBWI - STL
1 stop6h 33mUnited Airlines
Wed 2/51:02 pmSTL - BWI
1 stop6h 46mUnited Airlines
Deal found 1/15$294
This Southwest deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/157:15 pmBWI - STL
Nonstop2h 25mSouthwest
Tue 2/185:35 amSTL - BWI
Nonstop2h 05mSouthwest
Deal found 1/15$331
This American Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/95:02 amBWI - STL
1 stop4h 06mAmerican Airlines
Sun 10/129:36 amSTL - BWI
1 stop5h 19mAmerican Airlines
Deal found 1/15$416

Find flights from Baltimore to St. Louis within your budget

Customize your flight search to find flights from Baltimore to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 16, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 1/30

9:20 pm-11:31 pm

1 stop27h 11m

Lambert-St Louis

Sat 2/1

5:05 pm-7:51 am

1 stop13h 46m

$120

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 2/4

10:10 am-11:31 pm

1 stop14h 21m

Lambert-St Louis

Thu 2/6

4:28 pm-11:59 pm

1 stop6h 31m

$148

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 2/27

5:25 am-2:42 pm

1 stop10h 17m

Lambert-St Louis

Sun 3/2

4:00 pm-9:43 am

1 stop16h 43m

$176

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Mon 2/10

2:01 pm-6:01 pm

1 stop5h 00m

Lambert-St Louis

Tue 2/11

12:52 pm-6:12 pm

1 stop4h 20m

$206

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 1/29

10:05 am-3:38 pm

1 stop6h 33m

Lambert-St Louis

Wed 2/5

1:02 pm-8:48 pm

1 stop6h 46m

$294

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 2/11

1:48 pm-7:23 pm

1 stop6h 35m

Lambert-St Louis

Mon 2/17

5:45 am-11:10 am

1 stop4h 25m

$301

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Sat 2/15

7:15 pm-8:40 pm

Nonstop2h 25m

Lambert-St Louis

Sat 2/22

2:30 pm-5:25 pm

Nonstop1h 55m

$331

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 2/25

5:10 pm-11:43 pm

1 stop7h 33m

$55

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Fri 3/7

8:27 pm-9:04 am

1 stop13h 37m

$81

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 2/12

6:00 am-11:46 am

1 stop6h 46m

$105

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 13 results
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Compare providers for flights from Baltimore to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Baltimore to St. Louis in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Baltimore-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Baltimore-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Baltimore-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Baltimore-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Baltimore-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Baltimore to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Baltimore with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Baltimore to St. Louis

Get recent, data-driven insights about flights from Baltimore to St. Louis including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Baltimore to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Baltimore to St. Louis. Price data was last updated on January 10, 2025.

To ensure you get the cheapest price possible for a flight from Baltimore to St. Louis, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Baltimore to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Baltimore to St. Louis (average of $311). Flying from Baltimore to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BWI to STL?

Find hourly flight availability from Baltimore to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 16, 2025.

One of the essential ways to save on airfare from Baltimore to St. Louis is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 20% on airfare.

What is the cheapest day to fly from Baltimore to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Baltimore to St. Louis. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Baltimore to St. Louis flight should consider departing on Saturday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated January 16, 2025.
See what other customers who have flown with American Airlines, Frontier and Southwest from Baltimore to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
4,659 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

8.1
Very good
4,659 reviews
8.1
Very good
4,659 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

8.0
Very good
8,511 reviews
8.1
Very good
4,659 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

7.4
Good
8,964 reviews
8.1
Very good
4,659 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

7.2
Good
10,000 reviews
8.1
Very good
4,659 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

6.3
Okay
8,100 reviews
8.1
Very good
4,659 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from Baltimore to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airports do I use to fly from Baltimore to St. Louis?

    Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Baltimore/Washington. Booking flights from Baltimore/Washington (BWI) to Lambert-St Louis (STL) should be relatively easy as there are 2 daily flights to St. Louis from 6 different airlines. 2h 10m is how long a flight from Baltimore to Lambert-St Louis will take if you book a nonstop flight.

  • How popular is this Baltimore to St. Louis flight route?

  • What are the cheapest airlines flying from Baltimore to St. Louis round-trip?

    Flying on Frontier is currently your cheapest option to St. Louis, with prices starting at $120. Additional round-trip tickets that might be worth considering are offered by Spirit Airlines and Delta, with the lowest prices starting at $176 and $206, respectively. Users have found that Frontier is 66% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Baltimore to St. Louis one-way?

    The cheapest airlines for a one-way flight from Baltimore to St. Louis are Frontier ($55), Spirit Airlines ($81), and Delta ($105).

  • What are the cheapest flights from Baltimore to St. Louis?

    Looking for the cheapest flight from Baltimore to St. Louis? While on average our users pay $367, our data indicates the cheapest price to be $159. The most popular route (Baltimore/Washington - Lambert-St Louis), is priced around $130.

  • Can I find deals for flights from Baltimore to St. Louis that include hotel bookings?

    Yes. In addition to deals on Baltimore to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Baltimore to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Baltimore to St. Louis.

  • Can I find deals for business class flights from Baltimore to St. Louis?

    Yes. Cheapflights offers flight deals from Baltimore to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Baltimore to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Baltimore to St. Louis (average of $311). Flying from Baltimore to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Baltimore?

Book flights to Baltimore if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Alton
Farmington
Chesterfield

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Top 6 airlines flying from Baltimore to St. Louis

Discover the top 6 airlines that operate flights from Baltimore to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$171FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$133Average$189FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$158Average$376FlexibilityNo cancel feeOn-time69%
DeltaCheapest$176Average$325FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$398FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$240Average$388FlexibilityNo cancel feeOn-time63%
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