Baltimore

$80+ Cheap flights from St. Louis to Baltimore (STL - BWI)

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 6/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BWI
Apr 9 — Apr 161
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Cheapflights Tip: The best prices from Lambert-St Louis to Baltimore/Washington are usually found in September or March, booked 39 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from St. Louis to Baltimore

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Baltimore (BWI). 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 April 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$181
(American Airlines)

One-way from

$80
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$321
Provider with most accurate pricing for Lambert-St Louis-Baltimore/Washington flight deals.
Provider most trusted by Cheapflights users for Lambert-St Louis-Baltimore/Washington flights.
From Lambert-St Louis to Baltimore/Washington
One-way flight from Lambert-St Louis to Baltimore/Washington
Highest demand for flights based on searches. 9% potential increase in price ($34 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Average for round-trip flights in April 2025

Find flight deals from St. Louis to Baltimore

Cheapest flights from St. Louis to Baltimore
Explore the most affordable flight options available from St. Louis to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2025.

This American Airlines deal was found by Cheapflights users on 4/3. 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.
Wed 4/309:18 amSTL - BWI
1 stop6h 45mAmerican Airlines
Wed 5/75:00 amBWI - STL
1 stop4h 56mAmerican Airlines
Deal found 4/3$181
This Mytrip deal was found by Cheapflights users on 4/3. 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.
Tue 5/135:45 pmSTL - BWI
1 stop20h 50mFrontier
Sun 5/189:16 pmBWI - STL
1 stop27h 50mFrontier
Deal found 4/3$209
This Mytrip deal was found by Cheapflights users on 4/4. 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.
Sat 5/1710:10 amSTL - BWI
1 stop6h 16mMultiple Airlines
Sun 5/189:16 pmBWI - STL
1 stop27h 50mMultiple Airlines
Deal found 4/4$213
This Mytrip deal was found by Cheapflights users on 4/4. 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.
Thu 6/510:10 amSTL - BWI
1 stop7h 42mSpirit Airlines
Thu 6/122:08 pmBWI - STL
1 stop26h 14mSpirit Airlines
Deal found 4/4$216
This Southwest deal was found by Cheapflights users on 4/2. 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.
Wed 4/309:10 amSTL - BWI
Nonstop2h 00mSouthwest
Wed 5/711:05 amBWI - STL
Nonstop2h 15mSouthwest
Deal found 4/2$263
This Delta deal was found by Cheapflights users on 4/3. 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.
Wed 4/235:37 pmSTL - BWI
1 stop4h 45mDelta
Sat 4/267:42 pmBWI - STL
1 stop4h 54mDelta
Deal found 4/3$273
This United deal was found by Cheapflights users on 4/2. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/233:40 pmSTL - BWI
1 stop5h 02mUnited Airlines
Sat 4/265:07 pmBWI - STL
1 stop5h 41mUnited Airlines
Deal found 4/2$306

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Baltimore 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 April 4, 2025.
Use the filters below to find and compare flights from St. Louis to Baltimore that are best for you.

Fly from

St. Louis

Fly to

Baltimore

Route

Depart

Return

Price

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Wed 4/30

9:18 am-5:03 pm

1 stop6h 45m

Baltimore/Washington

Wed 5/7

5:00 am-8:56 am

1 stop4h 56m

$181

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 5/13

5:45 pm-3:35 pm

1 stop20h 50m

Baltimore/Washington

Sun 5/18

9:16 pm-12:06 am

1 stop27h 50m

$209

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Sat 5/17

10:10 am-5:26 pm

1 stop6h 16m

Baltimore/Washington

Sun 5/18

9:16 pm-12:06 am

1 stop27h 50m

$213

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 6/5

10:10 am-6:52 pm

1 stop7h 42m

Baltimore/Washington

Thu 6/12

2:08 pm-3:22 pm

1 stop26h 14m

$216

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Wed 4/30

9:10 am-12:10 pm

Nonstop2h 00m

Baltimore/Washington

Wed 5/7

11:05 am-12:20 pm

Nonstop2h 15m

$263

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Wed 4/23

5:37 pm-11:22 pm

1 stop4h 45m

Baltimore/Washington

Sat 4/26

7:42 pm-11:36 pm

1 stop4h 54m

$273

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Wed 4/23

3:40 pm-9:42 pm

1 stop5h 02m

Baltimore/Washington

Sat 4/26

5:07 pm-9:48 pm

1 stop5h 41m

$306

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Sun 6/15

4:17 pm-7:04 am

1 stop13h 47m

$80

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 5/20

6:47 pm-11:53 pm

1 stop4h 06m

$90

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Wed 4/30

5:32 pm-12:41 am

1 stop6h 09m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

Showing 1-10 of 15 results
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Compare providers for flights from St. Louis to Baltimore

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 St. Louis to Baltimore in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
FareScanPrice Accuracy-Trust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust 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 St. Louis-Baltimore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Baltimore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Baltimore flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Baltimore 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 St. Louis-Baltimore 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 St. Louis to Baltimore

Have a flexible travel schedule? Discover the best time to fly to Baltimore from St. Louis 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 St. Louis to Baltimore

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Baltimore. Price data was last updated on March 28, 2025.

Booking 39 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Baltimore. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from St. Louis to Baltimore (average of $241). Flying from St. Louis to Baltimore in March is currently the most expensive (average of $290). 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 STL to BWI?

Find hourly flight availability from St. Louis to Baltimore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 4, 2025.

It’s typically best to fly out from St. Louis to Baltimore at noon. Doing so could potentially save you 4% on the flight price compared to flying in the evening, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Baltimore. Price data was last updated on March 30, 2025.

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

Rainfall in Baltimore by month

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

In terms of precipitation, rainfall in Baltimore ranges from 2.9 - 4.1 inches per month. July is typically the wettest month, when rainfall can reach 4.1 in. February is typically the driest time to visit Baltimore when rainfall is around 2.9 in.

Temperature in Baltimore by month

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

If weather is an important factor for your trip to Baltimore, 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 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Baltimore

Get insights into the airlines that provide service to Baltimore. 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 Baltimore. Reviews last updated April 4, 2025.
Read reviews from past customers who have flown Southwest, Delta and United Airlines from St. Louis to Baltimore. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

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.

Entertainment

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

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.
8.0
Very good

Entertainment

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

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.

Entertainment

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

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.

Entertainment

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

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.

Entertainment

7.6

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.1

Comfort

8.0

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 St. Louis to Baltimore. 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 St. Louis to Baltimore?

    Baltimore/Washington is the airport most travelers will use when flying to Baltimore from Lambert-St Louis. Booking flights from Lambert-St Louis (STL) to Baltimore/Washington (BWI) should be relatively easy as there are 2 daily flights to Baltimore from 5 different airlines. 1h 55m is how long a flight from St. Louis to Baltimore/Washington will take if you book a nonstop flight.

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

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

    American Airlines, at $181, was found to be the cheapest airline from St. Louis to Baltimore.Alternate airlines to your destination round-trip include Frontier and Spirit Airlines. American Airlines is 45% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $80. Users have also found prices from $90 and $99 on American Airlines and Delta, respectively.

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

    The cheapest flight price from St. Louis to Baltimore is $108. On average you can expect to pay $287. The most popular route, (Lambert-St Louis - Baltimore/Washington), can usually be booked for $181.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Baltimore 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 St. Louis to Baltimore?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Baltimore (average of $241). Flying from St. Louis to Baltimore in March is currently the most expensive (average of $290). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from St. Louis to Baltimore

Discover the top 5 airlines that operate flights from St. Louis to Baltimore. 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 April 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$175FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$176Average$374FlexibilityNo cancel feeOn-time71%
DeltaCheapest$186Average$341FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$187Average$381FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$232Average$354FlexibilityNo cancel feeOn-time69%

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