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$109+ 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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IAD
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
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 December 18, 2024.

Round-trip from

$225
(Southwest)

One-way from

$109
(FlightHub)
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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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 December 18, 2024.

This American Airlines deal was found by Cheapflights users on 12/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:15 amSTL - DCA
Nonstop2h 04mAmerican Airlines
Thu 1/98:37 amDCA - STL
Nonstop2h 47mAmerican Airlines
Deal found 12/17$299
This Delta deal was found by Cheapflights users on 12/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:55 pmSTL - IAD
1 stop4h 07mDelta
Thu 1/912:31 pmIAD - STL
1 stop5h 11mDelta
Deal found 12/17$318
This Booking.com deal was found by Cheapflights users on 12/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/256:49 pmSTL - DCA
1 stop16h 19mFrontier
Wed 1/16:00 pmDCA - STL
1 stop28h 19mFrontier
Deal found 12/17$348
This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/307:43 amSTL - IAD
1 stop22h 32mFrontier
Mon 1/68:11 amIAD - STL
1 stop16h 29mFrontier
Deal found 12/17$368
This Southwest deal was found by Cheapflights users on 12/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/311:10 pmSTL - DCA
1 stop6h 50mSouthwest
Thu 1/24:00 pmDCA - STL
1 stop4h 55mSouthwest
Deal found 12/16$384
This American Airlines deal was found by Cheapflights users on 12/18. 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 12/312:27 pmSTL - IAD
1 stop4h 07mAmerican Airlines
Thu 1/91:53 pmIAD - STL
1 stop4h 29mAmerican Airlines
Deal found 12/18$407
This United deal was found by Cheapflights users on 12/17. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:33 pmSTL - IAD
2 stops12h 28mUnited Airlines
Thu 1/98:25 amIAD - STL
1 stop4h 51mUnited Airlines
Deal found 12/17$438
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:33 pmSTL - DCA
1 stop5h 26mUnited Airlines
Sat 1/47:30 amDCA - STL
1 stop5h 56mUnited Airlines
Deal found 12/17$488
This Delta deal was found by Cheapflights users on 12/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2412:55 pmSTL - DCA
1 stop5h 41mDelta
Fri 12/276:00 amDCA - STL
1 stop4h 33mDelta
Deal found 12/17$538
This Alaska Airlines deal was found by Cheapflights users on 12/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/257:00 amSTL - DCA
1 stop13h 59mAlaska Airlines
Tue 12/318:00 amDCA - STL
2 stops26h 36mAlaska Airlines
Deal found 12/17$1,668

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 December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 1/28

1:05 pm-4:00 pm

Nonstop1h 55m

Washington, D.C. Reagan-National

Tue 1/28

6:50 pm-8:15 pm

Nonstop2h 25m

$225

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 3/3

6:04 am-9:19 am

Nonstop2h 15m

Washington, D.C. Reagan-National

Mon 3/10

8:58 pm-10:22 pm

Nonstop2h 24m

$228

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Mon 1/6

8:25 am-11:43 am

Nonstop2h 18m

Washington, D.C. Dulles Intl

Wed 1/8

8:50 am-10:24 am

Nonstop2h 34m

$229

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 3/4

11:50 am-4:45 pm

1 stop3h 55m

Washington, D.C. Reagan-National

Wed 3/19

6:00 am-11:59 am

1 stop6h 59m

$248

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Tue 3/4

5:50 pm-11:13 pm

1 stop4h 23m

Washington, D.C. Dulles Intl

Sat 3/15

6:05 am-9:43 am

1 stop4h 38m

$248

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 3/7

5:33 pm-11:57 pm

1 stop5h 24m

Washington, D.C. Reagan-National

Sun 3/16

7:45 am-12:12 pm

1 stop5h 27m

$260

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 1/18

7:09 pm-9:59 pm

1 stop25h 50m

Washington, D.C. Reagan-National

Tue 1/21

7:00 am-9:16 am

1 stop27h 16m

$268

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Fri 1/31

6:29 pm-11:58 pm

1 stop4h 29m

Washington, D.C. Dulles Intl

Fri 2/7

8:05 pm-11:46 pm

1 stop4h 41m

$277

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Tue 3/4

5:20 pm-5:13 pm

1 stop22h 53m

Washington, D.C. Dulles Intl

Fri 3/7

5:54 pm-11:49 pm

1 stop6h 55m

$308

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Wed 1/15

2:49 pm-4:29 pm

1 stop24h 40m

Washington, D.C. Reagan-National

Tue 1/21

5:29 pm-1:53 pm

1 stop21h 24m

$1,283

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 20 results
1
2

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, November is the cheapest month in which you can book a flight from St. Louis to District of Columbia (average of $299). Flying from St. Louis to District of Columbia in June is currently the most expensive (average of $377). 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 December 18, 2024.

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 December 18, 2024.
Read reviews from past customers who have flown American Airlines, Frontier and United Airlines 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
4,848 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

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
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

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.

Alaska Airlines
8.0
Very good
9,554 reviews
Southwest
8.1
Very good
4,848 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

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
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

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
9,055 reviews
Southwest
8.1
Very good
4,848 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

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
4,848 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

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.

  • 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 Frontier ($109), American Airlines ($115), and United Airlines ($115).

  • What are the most reliable airlines from St. Louis to District of Columbia?

    Consider Lufthansa (93%), Avianca (90%) or Copa Airlines (89%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to District of Columbia.

  • 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 $1,802, our data indicates the cheapest price to be $163. The most popular route (Lambert-St Louis - Washington, D.C. Dulles Intl), is priced around $229.

  • 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, November is the cheapest month in which you can book a flight from St. Louis to District of Columbia (average of $299). Flying from St. Louis to District of Columbia in June is currently the most expensive (average of $377). 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 December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$190FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$129Average$318FlexibilityNo cancel feeOn-time71%
DeltaCheapest$177Average$311FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$190Average$339FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$211Average$368FlexibilityNo cancel feeOn-time69%
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