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$95+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — STL
abr. 16 — abr. 231
mié. 4/16
mié. 4/23
1 adult, Economy
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Cheapflights Tip: The best prices from Baltimore/Washington to Lambert-St Louis are usually found in October or July, booked 90 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 abril 11, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$176
(Mytrip)

One-way from

$95
(Frontier)

Popular in

May

Cheapest in

October

Average price

$344
Provider with most accurate pricing for Baltimore/Washington-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Baltimore/Washington-Lambert-St Louis flights.
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From Baltimore/Washington to Lambert-St Louis
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One-way flight from Baltimore/Washington to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 abril 11, 2025.

This Mytrip deal was found by Cheapflights users on 4/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/192:08 pmBWI - STL
1 stop26h 14mSpirit Airlines
dom. 6/224:17 pmSTL - BWI
1 stop13h 47mSpirit Airlines
Deal found 4/10$176
This FlightHub deal was found by Cheapflights users on 4/9. 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.
mar. 5/201:34 pmBWI - STL
1 stop11h 10mFrontier
mié. 5/215:45 pmSTL - BWI
1 stop13h 54mFrontier
Deal found 4/9$188
This FlightHub deal was found by Cheapflights users on 4/10. 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.
mié. 5/710:40 amBWI - STL
1 stop14h 26mMultiple Airlines
jue. 5/810:10 amSTL - BWI
1 stop7h 42mMultiple Airlines
Deal found 4/10$197
This Sun Country Air deal was found by Cheapflights users on 4/11. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1812:23 pmBWI - STL
1 stop24h 06mSun Country Air
dom. 9/217:34 amSTL - BWI
1 stop8h 07mSun Country Air
Deal found 4/11$245
This Southwest deal was found by Cheapflights users on 4/10. 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.
mar. 5/67:10 amBWI - STL
Nonstop2h 15mSouthwest
sáb. 5/106:30 amSTL - BWI
Nonstop2h 00mSouthwest
Deal found 4/10$263
This United Airlines deal was found by Cheapflights users on 4/10. 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.
sáb. 8/166:15 amBWI - STL
1 stop5h 25mUnited Airlines
lun. 8/188:00 amSTL - BWI
1 stop4h 48mUnited Airlines
Deal found 4/10$273
This American Airlines deal was found by Cheapflights users on 4/10. 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.
dom. 9/75:20 pmBWI - STL
1 stop7h 29mAmerican Airlines
lun. 9/225:29 amSTL - BWI
1 stop3h 49mAmerican Airlines
Deal found 4/10$278
This Delta deal was found by Cheapflights users on 4/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/55:40 amBWI - STL
1 stop4h 20mDelta
lun. 6/95:23 pmSTL - BWI
1 stop6h 03mDelta
Deal found 4/11$283

Cheapflights Fare Finder

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 abril 11, 2025.
Use the filters below to find and compare flights from Baltimore to St. Louis that are best for you.

Fly from

Baltimore

Fly to

St. Louis

Route

Depart

Return

Price

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

jue. 6/19

2:08 pm-3:22 pm

1 stop26h 14m

Lambert-St Louis

dom. 6/22

4:17 pm-7:04 am

1 stop13h 47m

$176

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

mar. 5/20

1:34 pm-11:44 pm

1 stop11h 10m

Lambert-St Louis

mié. 5/21

5:45 pm-8:39 am

1 stop13h 54m

$188

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

mié. 5/7

10:40 am-12:06 am

1 stop14h 26m

Lambert-St Louis

jue. 5/8

10:10 am-6:52 pm

1 stop7h 42m

$197

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

jue. 9/18

12:23 pm-11:29 am

1 stop24h 06m

Lambert-St Louis

dom. 9/21

7:34 am-4:41 pm

1 stop8h 07m

$245

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

mar. 5/6

7:10 am-8:25 am

Nonstop2h 15m

Lambert-St Louis

sáb. 5/10

6:30 am-9:30 am

Nonstop2h 00m

$263

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

sáb. 8/16

6:15 am-10:40 am

1 stop5h 25m

Lambert-St Louis

lun. 8/18

8:00 am-1:48 pm

1 stop4h 48m

$273

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

dom. 9/7

5:20 pm-11:49 pm

1 stop7h 29m

Lambert-St Louis

lun. 9/22

5:29 am-10:18 am

1 stop3h 49m

$278

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

jue. 6/5

5:40 am-9:00 am

1 stop4h 20m

Lambert-St Louis

lun. 6/9

5:23 pm-12:26 am

1 stop6h 03m

$283

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

mar. 5/20

1:34 pm-11:44 pm

1 stop11h 10m

$95

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

vie. 5/30

7:57 pm-9:15 am

1 stop14h 18m

$112

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 16 results
1
2

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust 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.

Cheapflights Insights

Everything you need to know about your flight from Baltimore to St. Louis

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 April 4, 2025.

To ensure you get the cheapest price possible for a flight from Baltimore to St. Louis, you should look to book at least 90 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 abril 11, 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 March 30, 2025.

Travelers seeking maximum savings on their Baltimore to St. Louis flight should consider departing on Tuesday mornings when fares are most often at their lowest. Sunday 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 abril 11, 2025.
See what other customers who have flown with Southwest, Delta and United Airlines 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.
Southwest
8.0
Very good
4,279 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,279 reviews
Southwest
8.0
Very good
4,279 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,911 reviews
Southwest
8.0
Very good
4,279 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,636 reviews
Southwest
8.0
Very good
4,279 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,279 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Sun Country Air
6.9
Okay
349 reviews
Southwest
8.0
Very good
4,279 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 3 daily flights to St. Louis from 5 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?

    Flights from Baltimore/Washington to Lambert-St Louis have been viewed 7 times in the past calendar month.

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

    Flying on Spirit Airlines is currently your cheapest option to St. Louis, with prices starting at $176. Additional round-trip tickets that might be worth considering are offered by Frontier and Sun Country Air, with the lowest prices starting at $188 and $245, respectively. Users have found that Spirit Airlines is 51% 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 ($95), Spirit Airlines ($112), and American Airlines ($123).

  • 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 $253, our data indicates the cheapest price to be $88. The most popular route (Baltimore/Washington - Lambert-St Louis), is priced around $176.

  • 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
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
Chesterfield

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Alternative routes for Baltimore to St. Louis

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Top 5 airlines flying from Baltimore to St. Louis

Discover the top 5 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 abril 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$215FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$168Average$386FlexibilityNo cancel feeOn-time71%
DeltaCheapest$176Average$318FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$197Average$382FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$288Average$548FlexibilityNo cancel feeOn-time69%

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