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$70+ Cheap flights from St. Louis (STL) to Maryland

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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BWI
Apr 20 — Apr 271
Mon 4/20
Mon 4/27
1 adult, Economy
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Cheap flight deals from St. Louis to Maryland

Cheapest flights from St. Louis to Maryland
Explore the most affordable flight options available from St. Louis to Maryland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 21, 2026.

This Frontier deal was found by Cheapflights users on 3/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Sat 4/185:45 pm
BWI
-
STL
1 stop6h 34m
Frontier
Deal found 3/21$140
This Expedia deal was found by Cheapflights users on 3/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/224:59 pm
STL
-
PHL
1 stop27h 34m
Frontier
Tue 4/287:56 pm
PHL
-
STL
1 stop28h 23m
Frontier
Deal found 3/20$140
This CheapOair deal was found by Cheapflights users on 3/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:17 pm
STL
-
PHL
1 stop8h 17m
Frontier
Fri 5/88:35 pm
PHL
-
STL
1 stop23h 48m
Frontier
Deal found 3/21$151
This Frontier deal was found by Cheapflights users on 3/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Tue 4/215:35 pm
BWI
-
STL
1 stop6h 44m
Frontier
Deal found 3/20$160
This Priceline deal was found by Cheapflights users on 3/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/184:16 pm
STL
-
PHL
1 stop11h 57m
Frontier
Sat 4/254:42 pm
PHL
-
STL
1 stop7h 37m
Frontier
Deal found 3/20$160
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:23 pm
STL
-
BWI
1 stop13h 59m
Frontier
Wed 4/295:49 pm
BWI
-
STL
1 stop17h 37m
Frontier
Deal found 3/16$169
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:16 pm
STL
-
PHL
1 stop8h 15m
Frontier
Wed 4/158:41 pm
PHL
-
STL
1 stop23h 40m
Frontier
Deal found 3/20$171
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Wed 4/225:49 pm
BWI
-
STL
1 stop17h 41m
Frontier
Deal found 3/17$174
This Expedia deal was found by Cheapflights users on 3/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/118:08 pm
STL
-
PHL
1 stop8h 29m
Frontier
Fri 5/1510:11 am
PHL
-
STL
1 stop15h 10m
Frontier
Deal found 3/20$180
This Frontier deal was found by Cheapflights users on 3/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:29 pm
STL
-
BWI
1 stop5h 15m
Frontier
Sat 4/115:42 pm
BWI
-
STL
1 stop6h 43m
Frontier
Deal found 3/20$181
This Priceline deal was found by Cheapflights users on 3/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:16 pm
STL
-
PHL
1 stop8h 15m
Frontier
Sun 4/125:01 am
PHL
-
STL
1 stop6h 37m
Frontier
Deal found 3/21$181
This Booking.com deal was found by Cheapflights users on 3/19. 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.
Sat 4/184:16 pm
STL
-
PHL
1 stop11h 57m
Frontier
Tue 4/217:56 pm
PHL
-
STL
1 stop28h 23m
Frontier
Deal found 3/19$187

Find flight deals from St. Louis to Maryland

Keep the following information in mind while searching for St. Louis to Maryland flight deals. Data was last updated March 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$140
(Expedia)

One-way from

$70
(Frontier)

Popular in

March

Cheapest in

August

Average price

$372

Good round-trip deal

$383 or less

Good one-way deal

$234 or less
Provider with most accurate pricing for Lambert-St Louis-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Washington, D.C. (WAS) flights.
Search Deals
From Lambert-St Louis to Maryland
Search Deals
One-way flight from Lambert-St Louis to Maryland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Maryland.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Maryland.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Maryland 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 March 21, 2026.
Use the filters below to find and compare flights from St. Louis to Maryland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Wed 4/15

2:30 pm-9:55 pm

1 stop6h 25m

Washington, D.C. Reagan-National

Sat 4/18

6:25 pm-7:50 pm

Nonstop2h 25m

$261

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 4/18

6:10 am-4:15 pm

2 stops9h 05m

Washington, D.C. Reagan-National

Tue 4/21

8:00 am-9:20 am

Nonstop2h 20m

$266

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Wed 4/8

10:50 am-4:35 pm

1 stop4h 45m

Washington, D.C. Reagan-National

Sat 4/11

6:00 am-9:46 am

1 stop4h 46m

$271

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Tue 5/12

7:09 pm-12:33 am

1 stop4h 24m

Washington, D.C. Dulles Intl

Sat 5/16

3:15 pm-9:13 pm

1 stop6h 58m

$271

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Tue 4/28

5:59 pm-11:03 pm

1 stop4h 04m

Washington, D.C. Dulles Intl

Thu 4/30

6:00 am-9:42 am

1 stop4h 42m

$271

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 5/14

3:25 pm-10:50 pm

1 stop6h 25m

Washington, D.C. Reagan-National

Tue 5/26

7:00 pm-10:10 pm

1 stop4h 10m

$271

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Mon 4/20

9:10 am-4:03 pm

1 stop5h 53m

Washington, D.C. Dulles Intl

Thu 4/23

9:00 am-10:28 am

Nonstop2h 28m

$275

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 4/7

7:55 pm-11:00 pm

Nonstop2h 05m

Washington, D.C. Reagan-National

Wed 4/15

6:00 am-12:25 pm

1 stop7h 25m

$275

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Mon 5/18

6:15 pm-10:56 pm

1 stop3h 41m

Washington, D.C. Dulles Intl

Wed 5/20

5:33 pm-9:29 pm

1 stop4h 56m

$285

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 4/9

8:35 am-11:35 am

Nonstop2h 00m

Washington, D.C. Reagan-National

Fri 4/17

12:15 pm-1:35 pm

Nonstop2h 20m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from St. Louis to Maryland

Have a flexible travel schedule? Discover the best time to fly to Maryland 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 Maryland

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

Currently, July is the cheapest month in which you can book a flight from St. Louis to Maryland (average of $161). Flying from St. Louis to Maryland in January is currently the most expensive (average of $351). 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 MD?

Find hourly flight availability from St. Louis to Maryland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 21, 2026.

Unlike in the morning, when flights are generally more expensive, you can save up to 3% on flights from St. Louis to Maryland by exploring options for tickets in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Maryland. Price data was last updated on March 14, 2026.

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

Reviews of airlines servicing Maryland

Get insights into the airlines that provide service to Maryland. 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 Maryland. Reviews last updated March 21, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andAmerican Airlines from St. Louis to Maryland by reading reviews from past customers. 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
4,325 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,325 reviews
Southwest
8.0
Very good
4,325 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,313 reviews
Southwest
8.0
Very good
4,325 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,487 reviews
Southwest
8.0
Very good
4,325 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,023 reviews
Southwest
8.0
Very good
4,325 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Maryland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Maryland?

    For a flight from St. Louis to Maryland, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

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

    The Lambert-St Louis to Maryland flight path was viewed by 31 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from St. Louis to Maryland?

    Airlines like Southwest, Delta, and United Airlines fly from St. Louis to Maryland in about 4h 24m. The time it takes to get you to your destination can typically vary by up to 2h 01m. Airlines will cover a distance of 694 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 to fly from St. Louis to Maryland one-way?

    The cheapest airlines for a one-way flight from St. Louis to Maryland are Frontier ($81), American Airlines ($106), and Delta ($110).

  • What are the most popular routes from St. Louis to Maryland?

    Most travelers choose Lambert-St Louis - Washington, D.C. Dulles Intl, Lambert-St Louis - Baltimore/Washington or Lambert-St Louis - Philadelphia when deciding on the best route from St. Louis to Maryland.

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

    On average you can expect to pay $402 for a flight from St. Louis to Maryland. The cheapest flight overall is $143 while the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl) is currently priced at $221.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from St. Louis to Maryland (average of $161). Flying from St. Louis to Maryland in January is currently the most expensive (average of $351). 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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Alternative routes for St. Louis to Maryland

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from St. Louis to Maryland

Discover the top 4 airlines that operate flights from St. Louis to Maryland. 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 March 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$147Average$218FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$196Average$377FlexibilityNo cancel feeOn-time71%
DeltaCheapest$196Average$297FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$239Average$391FlexibilityNo cancel feeOn-time63%

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