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$65+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BWI
Feb 8 — Feb 151
Sat 2/8
Sat 2/15
1 adult, Economy
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The best prices from Lambert-St Louis to Baltimore/Washington are usually found in September or February, booked 32 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 February 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$120
(Booking.com)

One-way from

$65
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$290
Provider with most accurate pricing for Lambert-St Louis-Baltimore/Washington flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Baltimore/Washington flights.
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From Lambert-St Louis to Baltimore/Washington
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One-way flight from Lambert-St Louis to Baltimore/Washington
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 February 3, 2025.

This Booking.com deal was found by Cheapflights users on 2/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/185:20 pmSTL - BWI
1 stop13h 01mFrontier
Sat 2/228:11 amBWI - STL
1 stop16h 32mFrontier
Deal found 2/3$120
This Justfly.com deal was found by Cheapflights users on 2/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/65:38 pmSTL - BWI
1 stop6h 19mMultiple Airlines
Mon 3/104:22 pmBWI - STL
1 stop8h 27mMultiple Airlines
Deal found 2/2$147
This Mytrip deal was found by Cheapflights users on 2/3. 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 2/254:00 pmSTL - BWI
2 stops15h 42mSpirit Airlines
Wed 2/268:39 pmBWI - STL
2 stops19h 03mSpirit Airlines
Deal found 2/3$164
This Southwest deal was found by Cheapflights users on 2/1. 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.
Thu 2/279:05 pmSTL - BWI
Nonstop2h 00mSouthwest
Mon 3/38:50 pmBWI - STL
Nonstop2h 25mSouthwest
Deal found 2/1$179
This Delta deal was found by Cheapflights users on 2/3. 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.
Tue 2/256:00 amSTL - BWI
1 stop5h 54mDelta
Sat 3/16:00 amBWI - STL
1 stop6h 46mDelta
Deal found 2/3$217
This American Airlines deal was found by Cheapflights users on 2/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/108:49 amSTL - BWI
1 stop6h 14mAmerican Airlines
Fri 3/148:12 pmBWI - STL
1 stop4h 44mAmerican Airlines
Deal found 2/2$278
This United Airlines deal was found by Cheapflights users on 2/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/276:30 amSTL - BWI
1 stop6h 23mUnited Airlines
Tue 3/410:51 amBWI - STL
1 stop4h 45mUnited Airlines
Deal found 2/3$307

Find flights from St. Louis to Baltimore within your budget

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 February 3, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 2/18

5:20 pm-7:21 am

1 stop13h 01m

Baltimore/Washington

Sat 2/22

8:11 am-11:43 pm

1 stop16h 32m

$120

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 3/6

5:38 pm-12:57 am

1 stop6h 19m

Baltimore/Washington

Mon 3/10

4:22 pm-11:49 pm

1 stop8h 27m

$147

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 2/25

4:00 pm-8:42 am

2 stops15h 42m

Baltimore/Washington

Wed 2/26

8:39 pm-2:42 pm

2 stops19h 03m

$164

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 2/27

9:05 pm-12:05 am

Nonstop2h 00m

Baltimore/Washington

Mon 3/3

8:50 pm-10:15 pm

Nonstop2h 25m

$179

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 2/25

6:00 am-12:54 pm

1 stop5h 54m

Baltimore/Washington

Sat 3/1

6:00 am-11:46 am

1 stop6h 46m

$217

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Mon 3/10

8:49 am-4:03 pm

1 stop6h 14m

Baltimore/Washington

Fri 3/14

8:12 pm-11:56 pm

1 stop4h 44m

$278

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 2/27

6:30 am-1:53 pm

1 stop6h 23m

Baltimore/Washington

Tue 3/4

10:51 am-2:36 pm

1 stop4h 45m

$307

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 3/4

5:20 pm-4:10 pm

1 stop21h 50m

$65

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 3/6

5:38 pm-12:57 am

1 stop6h 19m

$75

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 3/4

3:35 pm-6:35 pm

Nonstop2h 00m

$90

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Showing 1-10 of 14 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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FareScanPrice Accuracy-Trust Score*3 stars
MytripPrice Accuracy3 starsTrust 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.

Travel insights for flights from St. Louis to Baltimore

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

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 January 31, 2025.

Booking 32 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 February 3, 2025.

It’s typically best to fly out from St. Louis to Baltimore in the morning. Doing so could potentially save you 12% 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 February 2, 2025.

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

Weekly flight availability from St. Louis to Baltimore

Explore weekly flight availability from St. Louis to Baltimore. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated February 3, 2025.

The most flights from STL to BWI are scheduled on a Thursday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

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 February 3, 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.
Southwest
8.1
Very good
4,564 reviews

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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

Southwest
8.1
Very good
4,564 reviews
Southwest
8.1
Very good
4,564 reviews

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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

Delta
8.0
Very good
8,427 reviews
Southwest
8.1
Very good
4,564 reviews

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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

United Airlines
7.4
Good
8,889 reviews
Southwest
8.1
Very good
4,564 reviews

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,564 reviews

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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

Spirit Airlines
6.3
Okay
8,075 reviews
Southwest
8.1
Very good
4,564 reviews

Entertainment

7.7

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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

Related info for your journey

Find useful and relevant information for your journey from 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 4 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?

    Within the past month, 5 users have taken a look at flights from Lambert-St Louis to Baltimore/Washington.

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

    Frontier, at $120, was found to be the cheapest airline from St. Louis to Baltimore.Alternate airlines to your destination round-trip include Spirit Airlines and Southwest. Frontier is 65% 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 Frontier. According to our data, you can fly for as low as $65. Users have also found prices from $76 and $90 on Spirit Airlines and Southwest, respectively.

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

    The cheapest flight price from St. Louis to Baltimore is $150. On average you can expect to pay $378. The most popular route, (Lambert-St Louis - Baltimore/Washington), can usually be booked for $179.

  • 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.

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Alternative routes for St. Louis to Baltimore

See prices for flight routes from nearby airports that may be better suited for you.
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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 February 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$161FlexibilityNo cancel feeOn-time62%
DeltaCheapest$198Average$345FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$200Average$381FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$211Average$392FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$314Average$363FlexibilityNo cancel feeOn-time69%
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