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

Flights from Baltimore/Washington to Lambert-St Louis have been viewed 17 times in the past calendar month.

How long is the flight from Baltimore to St. Louis?

For as low as $305, Frontier can have you in St. Louis from Baltimore in 4h 30m. Airlines will cover a distance of 736 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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 $112. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $130 and $178, respectively. Users have found that Frontier is 67% 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 ($52), American Airlines ($88), and Delta ($98).

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.

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).

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 $362, our data indicates the cheapest price to be $153. The most popular route (Baltimore/Washington - Lambert-St Louis), is priced around $128.

What are the most popular airlines that fly from Baltimore to St. Louis?

Before booking your flight from Baltimore to St. Louis check out the most popular airlines for this route: Southwest, Frontier or Delta.

Most accurate provider : When it comes to deals on Baltimore-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Baltimore-St. Louis flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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 4 different airlines. 2h 15m is how long a flight from Baltimore to Lambert-St Louis will take if you book a nonstop flight.

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.

$55+ Flights from Baltimore to St. Louis

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Baltimore to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Baltimore/Washington to Lambert-St Louis are usually found in October or September, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap 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 December 12, 2025.

Mon 12/158:37 amBWI - STL

1 stop14h 56mFrontier

Wed 12/173:30 pmSTL - BWI

1 stop14h 52mFrontier

Deal found 12/10

$214

Sat 12/138:37 amBWI - STL

1 stop25h 22mFrontier

Mon 12/159:54 amSTL - BWI

1 stop9h 22mFrontier

Deal found 12/9

$264

Thu 12/119:11 pmBWI - STL

1 stop12h 48mFrontier

Mon 12/159:54 amSTL - BWI

1 stop9h 22mFrontier

Deal found 12/9

$293

Sat 12/138:37 amBWI - STL

1 stop25h 22mFrontier

Tue 12/163:30 pmSTL - BWI

1 stop17h 51mFrontier

Deal found 12/11

$294

Fri 12/129:11 pmBWI - STL

1 stop26h 22mFrontier

Tue 12/163:30 pmSTL - BWI

1 stop17h 51mFrontier

Deal found 12/11

$314

Thu 12/255:30 amBWI - STL

1 stop5h 10mFrontier

Mon 12/2910:40 amSTL - BWI

1 stop19h 42mFrontier

Deal found 12/10

$322

Thu 12/255:30 amBWI - STL

1 stop5h 10mFrontier

Wed 12/314:27 pmSTL - BWI

1 stop13h 55mFrontier

Deal found 12/10

$338

Fri 12/1910:00 pmBWI - STL

1 stop25h 33mFrontier

Mon 12/294:27 pmSTL - BWI

1 stop13h 55mFrontier

Deal found 12/11

$342

Fri 12/129:11 pmBWI - STL

1 stop26h 22mFrontier

Sun 12/149:54 amSTL - BWI

1 stop20h 48mFrontier

Deal found 12/11

$348

Thu 12/255:30 amBWI - STL

1 stop5h 10mMultiple Airlines

Tue 12/3011:51 amSTL - BWI

2 stops24h 19mMultiple Airlines

Deal found 12/9

$360

Best flights from Baltimore to St. Louis
Discover carefully curated flight deals from Baltimore to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

Thu 3/59:11 pmBWI - STL

1 stop11h 02mFrontier

Sun 3/810:42 amSTL - BWI

1 stop6h 10mFrontier

Deal found 12/10

$197

Tue 1/137:45 amBWI - STL

1 stop4h 30mSouthwest

Tue 1/132:35 pmSTL - BWI

Nonstop1h 55mSouthwest

Deal found 12/10

$305

Thu 1/85:35 amBWI - STL

1 stop10h 13mFrontier

Mon 1/128:50 amSTL - BWI

1 stop12h 54mFrontier

Deal found 12/9

$242

Wed 1/218:25 amBWI - STL

1 stop6h 45mSouthwest

Thu 1/222:35 pmSTL - BWI

Nonstop1h 55mSouthwest

Deal found 12/10

$317

Thu 3/59:39 pmBWI - STL

1 stop10h 28mFrontier

Thu 3/128:06 pmSTL - BWI

2 stops22h 52mFrontier

Deal found 12/10

$324

Thu 1/227:45 amBWI - STL

Nonstop2h 40mSouthwest

Sat 1/246:40 amSTL - BWI

Nonstop2h 00mSouthwest

Deal found 12/9

$335

Mon 1/125:30 pmBWI - STL

Nonstop2h 30mSouthwest

Thu 1/155:05 amSTL - BWI

Nonstop2h 00mSouthwest

Deal found 12/10

$335

Tue 1/204:20 pmBWI - STL

2 stops5h 40mSouthwest

Tue 1/2711:35 amSTL - BWI

2 stops6h 45mSouthwest

Deal found 12/9

$341

Last-minute flights from Baltimore to St. Louis
Discover last-minute flight deals from Baltimore to St. Louis. Data last updated December 12, 2025 and is based on user searches.

Fri 1/95:45 amBWI - STL

1 stop10h 03mFrontier

Mon 1/125:11 pmSTL - BWI

1 stop28h 25mFrontier

Deal found 12/11

$197

Mon 1/128:06 amBWI - STL

1 stop8h 59mFrontier

Tue 1/135:11 pmSTL - BWI

1 stop28h 25mFrontier

Deal found 12/10

$163

Fri 1/164:44 pmBWI - STL

1 stop6h 50mMultiple Airlines

Sat 1/175:11 pmSTL - BWI

1 stop17h 06mMultiple Airlines

Deal found 12/10

$184

Tue 1/207:10 amBWI - STL

1 stop24h 41mFrontier

Tue 1/275:42 pmSTL - BWI

1 stop22h 28mFrontier

Deal found 12/9

$120

Tue 1/207:10 amBWI - STL

1 stop24h 41mMultiple Airlines

Tue 1/275:42 pmSTL - BWI

2 stops28h 54mMultiple Airlines

Deal found 12/9

$139

Wed 1/218:00 amBWI - STL

1 stop16h 33mMultiple Airlines

Fri 1/235:42 pmSTL - BWI

1 stop16h 35mMultiple Airlines

Deal found 12/10

$159

Thu 1/221:22 pmBWI - STL

1 stop11h 11mFrontier

Sat 1/2411:00 amSTL - BWI

1 stop6h 50mFrontier

Deal found 12/9

$166

Fri 1/234:44 pmBWI - STL

1 stop7h 49mMultiple Airlines

Fri 1/3011:18 amSTL - BWI

1 stop11h 29mMultiple Airlines

Deal found 12/10

$171

Fri 1/237:24 pmBWI - STL

1 stop15h 37mFrontier

Fri 1/3011:18 amSTL - BWI

1 stop10h 23mFrontier

Deal found 12/11

$180

Mon 1/266:15 amBWI - STL

1 stop18h 18mFrontier

Tue 1/275:42 pmSTL - BWI

1 stop22h 28mFrontier

Deal found 12/11

$146

One-way flights from Baltimore to St. Louis
Search for one-way flight options from Baltimore to St. Louis. Find affordable one-way fares based on user searches. Data last updated December 12, 2025.

Tue 2/176:08 pmBWI - STL

1 stop13h 43mFrontier

Deal found 12/11

$55

Tue 1/136:05 amBWI - STL

1 stop25h 46mFrontier

Deal found 12/11

$56

Wed 1/78:00 amBWI - STL

1 stop15h 33mFrontier

Deal found 12/11

$60

Fri 1/304:01 pmBWI - STL

1 stop8h 32mFrontier

Deal found 12/11

$64

Tue 2/311:30 amBWI - STL

1 stop13h 03mMultiple Airlines

Deal found 12/11

$65

Thu 1/85:35 amBWI - STL

1 stop10h 13mFrontier

Deal found 12/11

$67

Wed 1/218:00 amBWI - STL

1 stop16h 33mFrontier

Deal found 12/10

$68

Tue 1/277:10 amBWI - STL

1 stop24h 41mFrontier

Deal found 12/11

$69

Fri 1/237:24 pmBWI - STL

1 stop15h 37mFrontier

Deal found 12/11

$70

Wed 2/258:25 pmBWI - STL

1 stop28h 34mFrontier

Deal found 12/11

$71

Sun 1/259:55 pmBWI - STL

1 stop12h 26mFrontier

Deal found 12/11

$74

Find flight deals from Baltimore to St. Louis

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$120 (Kiwi.com)
One-way from	$55 (Kiwi.com)
Popular in	November
Cheapest in	October
Average price	$448

Provider with most accurate pricing for Baltimore/Washington-Lambert-St Louis flight deals.

Search Deals

Provider most trusted by Cheapflights users for Baltimore/Washington-Lambert-St Louis flights.

Search Deals

From Baltimore/Washington to Lambert-St Louis

Search Deals

One-way flight from Baltimore/Washington to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 4% potential increase in price ($14 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 3/5

9:11 pm-7:13 am

1 stop11h 02m

Lambert-St Louis

Sun 3/8

10:42 am-5:52 pm

1 stop6h 10m

$197

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 1/8

5:35 am-2:48 pm

1 stop10h 13m

Lambert-St Louis

Mon 1/12

8:50 am-10:44 pm

1 stop12h 54m

$242

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 1/13

7:45 am-11:15 am

1 stop4h 30m

Lambert-St Louis

Tue 1/13

2:35 pm-5:30 pm

Nonstop1h 55m

$305

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 1/21

8:25 am-2:10 pm

1 stop6h 45m

Lambert-St Louis

Thu 1/22

2:35 pm-5:30 pm

Nonstop1h 55m

$317

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 3/5

9:39 pm-7:07 am

1 stop10h 28m

Lambert-St Louis

Thu 3/12

8:06 pm-7:58 pm

2 stops22h 52m

$324

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 1/22

7:45 am-9:25 am

Nonstop2h 40m

Lambert-St Louis

Sat 1/24

6:40 am-9:40 am

Nonstop2h 00m

$335

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Mon 1/12

5:30 pm-7:00 pm

Nonstop2h 30m

Lambert-St Louis

Thu 1/15

5:05 am-8:05 am

Nonstop2h 00m

$335

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 1/20

4:20 pm-9:00 pm

2 stops5h 40m

Lambert-St Louis

Tue 1/27

11:35 am-7:20 pm

2 stops6h 45m

$341

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 2/11

8:25 pm-11:59 pm

1 stop28h 34m

$68

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Sun 2/1

9:55 pm-11:33 pm

1 stop26h 38m

$74

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 18 results

Compare providers for flights from Baltimore to St. Louis

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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
JustAirTicket	Price Accuracy-	Trust Score*1 star

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Baltimore-St. Louis flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

To ensure you get the cheapest price possible for a flight from Baltimore to St. Louis, you should look to book at least 70 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, September is the cheapest month in which you can book a flight from Baltimore to St. Louis (average of $109). Flying from Baltimore to St. Louis in January is currently the most expensive (average of $222). 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?

One of the essential ways to save on airfare from Baltimore to St. Louis is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 11% on airfare.

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

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 afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for Baltimore to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Baltimore to St. Louis trip

Airports

BWI

For early morning flights, arrive 20-30 minutes early due to busy security lines from 6-8 a.m. on weekdays.

STL

Use the MetroLink light rail for a convenient and economical trip from STL to downtown St. Louis in about 40 minutes.

Our travel experts

Emily Zemler

Expert on BWI

Taryn White

Expert on STL

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Southwest, Delta, and American Airlines from Baltimore to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

7.9

Good

4,252 reviews

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Delta

7.9

Good

8,008 reviews

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,048 reviews

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Frontier

5.8

Fair

3,084 reviews

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

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 4 different airlines. 2h 15m 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 17 times in the past calendar month.
How long is the flight from Baltimore to St. Louis?
For as low as $305, Frontier can have you in St. Louis from Baltimore in 4h 30m. Airlines will cover a distance of 736 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
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 $112. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $130 and $178, respectively. Users have found that Frontier is 67% 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 ($52), American Airlines ($88), and Delta ($98).
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 $362, our data indicates the cheapest price to be $153. The most popular route (Baltimore/Washington - Lambert-St Louis), is priced around $128.
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, September is the cheapest month in which you can book a flight from Baltimore to St. Louis (average of $109). Flying from Baltimore to St. Louis in January is currently the most expensive (average of $222). 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

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Complete your trip

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Other flights to St. Louis

Top 4 airlines flying from Baltimore to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$113	Average$173	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$130	Average$212	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$178	Average$277	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$198	Average$375	FlexibilityNo cancel fee	On-time63%

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$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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Baltimore to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Baltimore/Washington to Lambert-St Louis are usually found in October or September, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Baltimore to St. Louis

Cheapest flights from Baltimore to St. LouisExplore 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 December 12, 2025.

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 December 12, 2025.

Find flight deals from Baltimore to St. Louis

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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 December.

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.

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?

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

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

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

The best insider tips for Baltimore to St. Louis flights

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your Baltimore to St. Louis trip

Airports

BWI

STL

Our travel experts

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Southwest, Delta, and American Airlines from Baltimore to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

How long is the flight from Baltimore to St. Louis?

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

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

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

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

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

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

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

Traveling to a place near St. Louis?

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Alternative routes for Baltimore to St. Louis

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Top 4 airlines flying from Baltimore to St. Louis

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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 December 12, 2025.