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$115+ Cheap flights from St. Louis (STL) to District of Columbia

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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BWI
Jan 27 — Feb 31
Mon 1/27
Mon 2/3
1 adult, Economy
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Cheap flight deals from St. Louis to District of Columbia

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to District of Columbia (USDC). 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 January 22, 2025.

Round-trip from

$229
(Southwest)

One-way from

$115
(American Airlines)

Good round-trip deal

$256 or less

Good one-way deal

$119 or less
From Lambert-St Louis to District of Columbia
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One-way flight from Lambert-St Louis to District of Columbia
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Price to beat on a round-trip flight from Lambert-St Louis to District of Columbia.
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Price to beat on a one-way flight from Lambert-St Louis to District of Columbia.
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Find flight deals from St. Louis to District of Columbia

Cheapest flights from St. Louis to District of Columbia
Explore the most affordable flight options available from St. Louis to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 22, 2025.

This Southwest deal was found by Cheapflights users on 1/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/248:00 pmSTL - DCA
Nonstop1h 55mSouthwest
Sat 4/56:35 pmDCA - STL
1 stop5h 45mSouthwest
Deal found 1/21$229
This Delta deal was found by Cheapflights users on 1/22. 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.
Sat 2/225:29 pmSTL - DCA
1 stop3h 59mDelta
Sun 3/26:00 amDCA - STL
1 stop4h 36mDelta
Deal found 1/22$233
This Delta deal was found by Cheapflights users on 1/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/1510:59 amSTL - IAD
1 stop4h 39mDelta
Sun 2/235:16 pmIAD - STL
1 stop5h 33mDelta
Deal found 1/21$233
This CheapOair deal was found by Cheapflights users on 1/22. 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.
Fri 2/147:09 pmSTL - DCA
1 stop20h 50mFrontier
Sun 2/166:00 pmDCA - STL
1 stop16h 16mFrontier
Deal found 1/22$238
This United Airlines deal was found by Cheapflights users on 1/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/191:00 pmSTL - IAD
Nonstop2h 04mUnited Airlines
Tue 2/258:35 amIAD - STL
Nonstop2h 30mUnited Airlines
Deal found 1/20$240
This CheapOair deal was found by Cheapflights users on 1/21. 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.
Fri 3/75:24 pmSTL - IAD
1 stop20h 20mFrontier
Sun 3/165:54 pmIAD - STL
1 stop6h 55mFrontier
Deal found 1/21$246
This American Airlines deal was found by Cheapflights users on 1/22. 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.
Thu 7/105:49 pmSTL - DCA
Nonstop2h 00mAmerican Airlines
Mon 7/148:00 pmDCA - STL
Nonstop2h 29mAmerican Airlines
Deal found 1/22$253
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/411:30 amSTL - DCA
1 stop6h 36mUnited Airlines
Tue 2/1110:30 amDCA - STL
1 stop4h 44mUnited Airlines
Deal found 1/21$294
This American Airlines deal was found by Cheapflights users on 1/22. 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.
Tue 4/15:55 amSTL - IAD
2 stops10h 02mAmerican Airlines
Fri 4/49:10 amIAD - STL
1 stop4h 43mAmerican Airlines
Deal found 1/22$320
This Mytrip deal was found by Cheapflights users on 1/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2912:15 pmSTL - IAD
3 stops22h 32mMultiple Airlines
Sun 6/111:54 amIAD - STL
2 stops7h 47mMultiple Airlines
Deal found 1/21$437

Find flights from St. Louis to District of Columbia within your budget

Customize your flight search to find flights from St. Louis to District of Columbia 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 January 22, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 3/24

8:00 pm-10:55 pm

Nonstop1h 55m

Washington, D.C. Reagan-National

Sat 4/5

6:35 pm-11:20 pm

1 stop5h 45m

$229

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 2/22

5:29 pm-10:28 pm

1 stop3h 59m

Washington, D.C. Reagan-National

Sun 3/2

6:00 am-9:36 am

1 stop4h 36m

$233

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 2/15

4:40 pm-12:20 am

1 stop6h 40m

Washington, D.C. Dulles Intl

Sun 2/23

6:00 am-11:46 am

1 stop6h 46m

$233

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 2/14

7:09 pm-4:59 pm

1 stop20h 50m

Washington, D.C. Reagan-National

Sun 2/16

6:00 pm-9:16 am

1 stop16h 16m

$238

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Thu 2/27

8:25 am-11:34 am

Nonstop2h 09m

Washington, D.C. Dulles Intl

Fri 2/28

8:30 am-2:36 pm

1 stop7h 06m

$240

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Fri 3/7

5:24 pm-10:32 am

1 stop16h 08m

Washington, D.C. Dulles Intl

Sun 3/16

5:54 pm-9:36 am

1 stop16h 42m

$246

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 7/10

5:49 pm-8:49 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Mon 7/14

8:00 pm-9:29 pm

Nonstop2h 29m

$253

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 2/4

11:30 am-7:06 pm

1 stop6h 36m

Washington, D.C. Reagan-National

Tue 2/11

10:30 am-2:14 pm

1 stop4h 44m

$294

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Tue 4/1

5:55 am-4:57 pm

2 stops10h 02m

Washington, D.C. Dulles Intl

Fri 4/4

9:10 am-12:53 pm

1 stop4h 43m

$320

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sun 5/11

6:30 am-9:29 am

Nonstop1h 59m

$115

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

Showing 1-10 of 19 results
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Best time to book a flight from St. Louis to District of Columbia

Have a flexible travel schedule? Discover the best time to fly to District of Columbia 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 District of Columbia

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

What is the cheapest month to book a flight from St. Louis to District of Columbia?

Currently, August is the cheapest month in which you can book a flight from St. Louis to District of Columbia (average of $241). Flying from St. Louis to District of Columbia 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 DC?

Find hourly flight availability from St. Louis to District of Columbia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 22, 2025.

When flying from St. Louis to District of Columbia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in District of Columbia ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit District of Columbia when rainfall is around 2.6 in.

Temperature in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to District of Columbia, 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 35.6 F).

Reviews of airlines servicing District of Columbia

Get insights into the airlines that provide service to District of Columbia. 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 District of Columbia. Reviews last updated January 22, 2025.
Read reviews from past customers who have flown Frontier, American Airlines and Delta from St. Louis to District of Columbia. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,654 reviews

Comfort

8.1

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Reviews

1 / 10

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
4,654 reviews
Southwest
8.1
Very good
4,654 reviews

Comfort

8.1

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Reviews

1 / 10

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
8,514 reviews
Southwest
8.1
Very good
4,654 reviews

Comfort

8.1

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Reviews

1 / 10

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
8,975 reviews
Southwest
8.1
Very good
4,654 reviews

Comfort

8.1

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Reviews

1 / 10

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
4,654 reviews

Comfort

8.1

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Reviews

1 / 10

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.

Frontier
6.1
Okay
3,442 reviews
Southwest
8.1
Very good
4,654 reviews

Comfort

8.1

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Reviews

1 / 10

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 District of Columbia. 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 District of Columbia?

    If you book a flight to District of Columbia from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

  • How popular is this St. Louis to District of Columbia flight route?

    Flights from Lambert-St Louis to District of Columbia have been viewed 5 times in the past calendar month.

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

    The cheapest airlines for a one-way flight from St. Louis to District of Columbia are American Airlines ($115), United Airlines ($115), and Delta ($119).

  • What are the cheapest flights from St. Louis to District of Columbia?

    Looking for the cheapest flight from St. Louis to District of Columbia? While on average our users pay $337, our data indicates the cheapest price to be $150. The most popular route (Lambert-St Louis - Washington, D.C. Dulles Intl), is priced around $180.

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

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

  • How can I find direct flights from St. Louis to District of Columbia?

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

  • Can I find deals for business class flights from St. Louis to District of Columbia?

    Yes. Cheapflights offers flight deals from St. Louis to District of Columbia 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 District of Columbia?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to District of Columbia (average of $241). Flying from St. Louis to District of Columbia 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 District of Columbia

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 District of Columbia

Discover the top 5 airlines that operate flights from St. Louis to District of Columbia. 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 January 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$175FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$129Average$320FlexibilityNo cancel feeOn-time71%
DeltaCheapest$177Average$308FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$200Average$340FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$211Average$378FlexibilityNo cancel feeOn-time69%
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