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$97+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IAD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from St. Louis to District of Columbia

Keep the following information in mind while searching for St. Louis to District of Columbia flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$210
(Booking.com)

One-way from

$97
(Booking.com)

Popular in

October

Cheapest in

November

Average price

$293

Good round-trip deal

$269 or less

Good one-way deal

$114 or less
Provider with most accurate pricing for Lambert-St Louis-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Washington, D.C. (WAS) flights.
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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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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 February 20, 2025.

This Booking.com deal was found by Cheapflights users on 2/19. 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.
Mon 3/37:04 pmSTL - DCA
1 stop25h 55mFrontier
Thu 3/67:00 amDCA - STL
1 stop27h 16mFrontier
Deal found 2/19$210
This Frontier deal was found by Cheapflights users on 2/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1010:36 amSTL - IAD
1 stop5h 37mFrontier
Fri 3/144:10 pmIAD - STL
1 stop8h 39mFrontier
Deal found 2/19$210
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/214:45 pmSTL - DCA
1 stop4h 49mDelta
Tue 3/252:40 pmDCA - STL
1 stop7h 12mDelta
Deal found 2/20$217
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/84:40 pmSTL - IAD
1 stop6h 42mDelta
Mon 3/107:35 amIAD - STL
1 stop5h 25mDelta
Deal found 2/20$217
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/48:05 pmSTL - DCA
Nonstop1h 55mSouthwest
Mon 4/74:05 pmDCA - STL
1 stop4h 55mSouthwest
Deal found 2/19$223
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/81:51 pmSTL - DCA
1 stop5h 43mAmerican Airlines
Mon 3/108:58 pmDCA - STL
Nonstop2h 24mAmerican Airlines
Deal found 2/20$227
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/248:25 amSTL - IAD
Nonstop2h 14mUnited Airlines
Thu 3/278:35 amIAD - STL
Nonstop2h 33mUnited Airlines
Deal found 2/19$229
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/26:32 pmSTL - IAD
1 stop4h 26mAmerican Airlines
Mon 4/75:00 amIAD - STL
1 stop4h 30mAmerican Airlines
Deal found 2/19$257
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Fri 2/287:05 amSTL - DCA
1 stop7h 20mUnited Airlines
Mon 3/311:30 amDCA - STL
1 stop5h 10mUnited Airlines
Deal found 2/20$270
This Kissandfly.com deal was found by Cheapflights users on 2/20. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/71:00 pmSTL - DCA
2 stops23h 07mSouthern / Mokulele
Sun 3/98:45 amDCA - STL
2 stops16h 11mSouthern / Mokulele
Deal found 2/20$485

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 February 20, 2025.

Fly from

St. Louis

Fly to

District of Columbia

Route

Depart

Return

Price

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 3/3

7:04 pm-9:59 pm

1 stop25h 55m

Washington, D.C. Reagan-National

Thu 3/6

7:00 am-9:16 am

1 stop27h 16m

$210

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Mon 3/10

10:36 am-5:13 pm

1 stop5h 37m

Washington, D.C. Dulles Intl

Fri 3/14

4:10 pm-11:49 pm

1 stop8h 39m

$210

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 3/21

4:45 pm-10:34 pm

1 stop4h 49m

Washington, D.C. Reagan-National

Wed 3/26

6:00 am-9:14 am

1 stop4h 14m

$217

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 3/8

4:40 pm-12:22 am

1 stop6h 42m

Washington, D.C. Dulles Intl

Mon 3/10

7:35 am-12:00 pm

1 stop5h 25m

$217

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 4/4

8:05 pm-11:00 pm

Nonstop1h 55m

Washington, D.C. Reagan-National

Mon 4/7

4:05 pm-8:00 pm

1 stop4h 55m

$223

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 3/8

1:51 pm-8:34 pm

1 stop5h 43m

Washington, D.C. Reagan-National

Mon 3/10

8:58 pm-10:22 pm

Nonstop2h 24m

$227

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Mon 3/24

8:25 am-11:39 am

Nonstop2h 14m

Washington, D.C. Dulles Intl

Thu 3/27

8:35 am-10:08 am

Nonstop2h 33m

$229

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Wed 4/2

6:32 pm-11:58 pm

1 stop4h 26m

Washington, D.C. Dulles Intl

Mon 4/7

5:00 am-8:30 am

1 stop4h 30m

$257

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 2/28

7:05 am-3:25 pm

1 stop7h 20m

Washington, D.C. Reagan-National

Mon 3/3

11:30 am-3:40 pm

1 stop5h 10m

$270

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 3/7

1:00 pm-1:07 pm

2 stops23h 07m

Washington, D.C. Reagan-National

Sun 3/9

8:45 am-11:56 pm

2 stops16h 11m

$485

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 22 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 $309). Flying from St. Louis to District of Columbia in June is currently the most expensive (average of $389). 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 February 20, 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.

Weekly flight availability from St. Louis to District of Columbia

Explore weekly flight availability from St. Louis to District of Columbia. 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 20, 2025.

The most flights from STL to USDC are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

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 February 20, 2025.
Read reviews from past customers who have flown Southwest, Alaska 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
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 ($97), Delta ($99), and Southwest ($109).

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

    Consider Avianca (87%), Copa Airlines (87%) or GoJet (80%) 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 $645, our data indicates the cheapest price to be $124. The most popular route (Lambert-St Louis - Washington, D.C. Dulles Intl), is priced around $171.

  • 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 $309). Flying from St. Louis to District of Columbia in June is currently the most expensive (average of $389). 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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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$175FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$129Average$318FlexibilityNo cancel feeOn-time71%
DeltaCheapest$177Average$301FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$200Average$345FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$211Average$375FlexibilityNo cancel feeOn-time69%
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