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

Flights from Baltimore/Washington to Lambert-St Louis have been viewed 6 times in the past calendar month.

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

Flying on Southwest is currently your cheapest option to St. Louis, with prices starting at $177. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $217 and $218, respectively. Users have found that Southwest is 50% 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 Spirit Airlines ($75), Southwest ($89), and Delta ($99).

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 $283, our data indicates the cheapest price to be $88. The most popular route (Baltimore/Washington - Lambert-St Louis), is priced around $177.

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: American Airlines, Delta or Frontier.

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

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 26% on your flight compared to booking on days when demand is much higher.

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

To save on the cost of your flight from Baltimore to St. Louis, book at least 59 days before your planned departure. Booking around this time can save you about 192% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $414 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $609.

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

August is one of the best times of the year to fly to St. Louis from Baltimore. Prices for August average $328 per person but you can even find prices for as low as $185. The most expensive prices can be found in the month of March. Opting for a August flight can save you 15% on your journey compared to booking in March

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.

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 6 different airlines. 2h 10m 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.

$75+ Flights from Baltimore to St. Louis

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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 April, booked 90 days in advance, depart on a Wednesday or Friday and return on a Tuesday

Cheap flight deals from Baltimore to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$177 (Southwest)
One-way from	$75 (Cheapflightsfares)
Popular in	May
Cheapest in	October
Average price	$375

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. 5% potential increase in price ($23 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

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 March 25, 2025.

Wed 4/237:10 amBWI - STL

Nonstop2h 15mSouthwest

Wed 4/306:15 amSTL - BWI

Nonstop2h 00mSouthwest

Deal found 3/24

$177

Fri 7/45:40 amBWI - STL

1 stop4h 59mDelta

Sat 7/53:43 pmSTL - BWI

1 stop5h 59mDelta

Deal found 3/24

$217

Wed 6/185:00 amBWI - STL

1 stop4h 13mAmerican Airlines

Wed 7/211:47 amSTL - BWI

1 stop7h 11mAmerican Airlines

Deal found 3/24

$218

Wed 4/167:55 pmBWI - STL

1 stop22h 20mSpirit Airlines

Thu 4/246:10 pmSTL - BWI

1 stop5h 46mSpirit Airlines

Deal found 3/24

$223

Thu 5/89:16 pmBWI - STL

1 stop27h 50mMultiple Airlines

Thu 5/1510:10 amSTL - BWI

1 stop11h 56mMultiple Airlines

Deal found 3/24

$237

Thu 4/38:15 amBWI - STL

1 stop16h 31mFrontier

Sat 4/54:57 pmSTL - BWI

1 stop13h 28mFrontier

Deal found 3/24

$240

Thu 5/1512:20 pmBWI - STL

1 stop24h 17mSun Country Air

Sun 5/187:30 amSTL - BWI

1 stop27h 00mSun Country Air

Deal found 3/24

$245

Tue 5/1310:50 amBWI - STL

1 stop5h 57mUnited Airlines

Sat 5/178:00 amSTL - BWI

1 stop5h 16mUnited Airlines

Deal found 3/24

$523

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 March 25, 2025.

Wed 4/237:10 amBWI - STL

Nonstop2h 15mSouthwest

Wed 4/306:15 amSTL - BWI

Nonstop2h 00mSouthwest

Deal found 3/24

$177

Sat 5/39:00 amBWI - STL

1 stop7h 06mDelta

Mon 5/54:05 pmSTL - BWI

1 stop4h 51mDelta

Deal found 3/25

$217

Wed 6/185:00 amBWI - STL

1 stop4h 13mAmerican Airlines

Wed 7/211:47 amSTL - BWI

1 stop7h 11mAmerican Airlines

Deal found 3/24

$218

Wed 4/167:55 pmBWI - STL

1 stop22h 20mSpirit Airlines

Thu 4/246:10 pmSTL - BWI

1 stop5h 46mSpirit Airlines

Deal found 3/24

$223

Tue 4/810:35 amBWI - STL

1 stop14h 11mFrontier

Sat 4/124:57 pmSTL - BWI

1 stop13h 28mFrontier

Deal found 3/23

$242

Thu 5/1512:20 pmBWI - STL

1 stop24h 17mSun Country Air

Sun 5/187:30 amSTL - BWI

1 stop27h 00mSun Country Air

Deal found 3/24

$245

Tue 4/226:50 amBWI - STL

1 stop11h 25mMultiple Airlines

Sun 4/275:41 pmSTL - BWI

1 stop21h 37mMultiple Airlines

Deal found 3/24

$271

Thu 8/2110:45 amBWI - STL

1 stop5h 59mUnited Airlines

Sun 8/248:10 amSTL - BWI

1 stop4h 47mUnited Airlines

Deal found 3/25

$453

Last-minute flights from Baltimore to St. Louis
Discover last-minute flight deals from Baltimore to St. Louis. Data last updated March 25, 2025 and is based on user searches.

Tue 3/2512:00 pmBWI - STL

1 stop4h 43mDelta

Fri 3/285:37 pmSTL - BWI

1 stop4h 38mDelta

Deal found 3/24

$650

Wed 4/24:06 pmBWI - STL

1 stop8h 40mFrontier

Thu 4/34:57 pmSTL - BWI

1 stop13h 28mFrontier

Deal found 3/25

$240

Wed 4/25:00 amBWI - STL

1 stop4h 09mAmerican Airlines

Wed 4/211:55 amSTL - BWI

1 stop4h 51mAmerican Airlines

Deal found 3/24

$655

Thu 4/36:05 amBWI - STL

2 stops30h 29mMultiple Airlines

Sun 4/66:47 pmSTL - BWI

2 stops18h 31mMultiple Airlines

Deal found 3/24

$334

Thu 4/35:30 amBWI - STL

2 stops13h 22mSpirit Airlines

Sun 4/66:47 pmSTL - BWI

1 stop28h 37mSpirit Airlines

Deal found 3/24

$360

Thu 4/310:20 pmBWI - STL

Nonstop2h 20mSouthwest

Mon 4/148:35 amSTL - BWI

Nonstop2h 00mSouthwest

Deal found 3/24

$419

Tue 4/810:50 amBWI - STL

1 stop4h 52mUnited Airlines

Wed 4/98:00 amSTL - BWI

1 stop5h 18mUnited Airlines

Deal found 3/24

$549

Wed 4/167:55 pmBWI - STL

1 stop22h 20mSpirit Airlines

Thu 4/246:10 pmSTL - BWI

1 stop5h 46mSpirit Airlines

Deal found 3/24

$223

Wed 4/169:32 pmBWI - STL

1 stop20h 43mMultiple Airlines

Thu 4/249:50 amSTL - BWI

3 stops13h 16mMultiple Airlines

Deal found 3/24

$281

Thu 4/175:00 amBWI - STL

1 stop4h 30mAmerican Airlines

Thu 4/245:45 amSTL - BWI

1 stop15h 04mAmerican Airlines

Deal found 3/24

$250

Wed 4/237:10 amBWI - STL

Nonstop2h 15mSouthwest

Wed 4/306:15 amSTL - BWI

Nonstop2h 00mSouthwest

Deal found 3/24

$177

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 March 25, 2025.

Tue 4/2910:27 amBWI - STL

1 stop7h 48mSpirit Airlines

Deal found 3/24

$75

Mon 5/59:30 pmBWI - STL

Nonstop2h 15mSouthwest

Deal found 3/24

$89

Thu 5/15:50 amBWI - STL

1 stop4h 46mDelta

Deal found 3/24

$99

Tue 4/13:53 pmBWI - STL

1 stop8h 53mFrontier

Deal found 3/24

$120

Mon 5/195:15 pmBWI - STL

2 stops26h 26mMultiple Airlines

Deal found 3/24

$152

Tue 5/275:00 amBWI - STL

2 stops19h 51mAmerican Airlines

Deal found 3/24

$243

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

Wed 4/23

7:10 am-8:25 am

Nonstop2h 15m

Lambert-St Louis

Wed 4/30

6:15 am-9:15 am

Nonstop2h 00m

$177

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Fri 7/4

5:40 am-9:39 am

1 stop4h 59m

Lambert-St Louis

Sat 7/5

3:43 pm-10:42 pm

1 stop5h 59m

$217

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 6/18

5:00 am-8:13 am

1 stop4h 13m

Lambert-St Louis

Wed 7/2

11:47 am-7:58 pm

1 stop7h 11m

$218

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 4/16

7:55 pm-5:15 pm

1 stop22h 20m

Lambert-St Louis

Thu 4/24

6:10 pm-12:56 am

1 stop5h 46m

$223

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 5/8

9:16 pm-12:06 am

1 stop27h 50m

Lambert-St Louis

Thu 5/15

10:10 am-11:06 pm

1 stop11h 56m

$237

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 4/8

10:35 am-11:46 pm

1 stop14h 11m

Lambert-St Louis

Sat 4/12

4:57 pm-7:25 am

1 stop13h 28m

$242

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 5/15

12:20 pm-11:37 am

1 stop24h 17m

Lambert-St Louis

Sun 5/18

7:30 am-11:30 am

1 stop27h 00m

$245

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 5/13

10:50 am-3:47 pm

1 stop5h 57m

Lambert-St Louis

Sat 5/17

8:00 am-2:16 pm

1 stop5h 16m

$523

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 4/29

10:27 am-5:15 pm

1 stop7h 48m

$75

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Mon 5/5

9:30 pm-10:45 pm

Nonstop2h 15m

$89

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 14 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 March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	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?

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?

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 morning could potentially save you up to 19% 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 Friday afternoons when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in St. Louis 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

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

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

4,272 reviews

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

4,272 reviews

Southwest

8.0

Very good

4,272 reviews

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

7,890 reviews

Southwest

8.0

Very good

4,272 reviews

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

8,605 reviews

Southwest

8.0

Very good

4,272 reviews

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

4,272 reviews

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

348 reviews

Southwest

8.0

Very good

4,272 reviews

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

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 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?
Flights from Baltimore/Washington to Lambert-St Louis have been viewed 6 times in the past calendar month.
What are the cheapest airlines flying from Baltimore to St. Louis round-trip?
Flying on Southwest is currently your cheapest option to St. Louis, with prices starting at $177. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $217 and $218, respectively. Users have found that Southwest is 50% 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 Spirit Airlines ($75), Southwest ($89), and Delta ($99).
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 $283, our data indicates the cheapest price to be $88. The most popular route (Baltimore/Washington - Lambert-St Louis), is priced around $177.
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

Fenton

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Wentzville

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Other flights to St. Louis

Top 6 airlines flying from Baltimore to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$108	Average$202	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$133	Average$189	FlexibilityNo cancel fee	On-time65%
American Airlines	Cheapest$168	Average$385	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$176	Average$320	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$205	Average$381	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$288	Average$548	FlexibilityNo cancel fee	On-time69%

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$75+ 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 4/29. 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 April, booked 90 days in advance, depart on a Wednesday or Friday and return on a Tuesday

Cheap 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

Find 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 March 25, 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 March 25, 2025.

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 March.

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?

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 March 21, 2025.

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?

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 March 25, 2025.

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 23, 2025.

Rainfall in St. Louis by month

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

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

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.

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.

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Alternative routes for Baltimore to St. Louis

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Top 6 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 March 25, 2025.