St. Louis

$90+ Cheap flights from District of Columbia to St. Louis (STL)

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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — STL
May 5 — May 121
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Cheap flight deals from District of Columbia to St. Louis

Keep the following information in mind while searching for District of Columbia to St. Louis flight deals. Data was last updated April 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$207
(Southwest)

One-way from

$90
(United Airlines)

Popular in

March

Cheapest in

August

Average price

$343

Good round-trip deal

$276 or less

Good one-way deal

$158 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Lambert-St Louis flight deals.
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Lambert-St Louis flights.
From District of Columbia to Lambert-St Louis
One-way flight from District of Columbia to Lambert-St Louis
Highest demand for flights based on searches. 8% potential increase in price ($31 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Average for round-trip flights in April 2025
Price to beat on a round-trip flight from District of Columbia to Lambert-St Louis.
Price to beat on a one-way flight from District of Columbia to Lambert-St Louis.

Find flight deals from District of Columbia to St. Louis

Cheapest flights from District of Columbia to St. Louis
Explore the most affordable flight options available from District of Columbia to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2025.

This Southwest deal was found by Cheapflights users on 4/27. 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.
Sat 5/242:25 pmDCA - STL
1 stop6h 35mSouthwest
Wed 5/287:05 pmSTL - DCA
Nonstop2h 00mSouthwest
Deal found 4/27$207
This Booking.com deal was found by Cheapflights users on 4/28. 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.
Fri 5/91:00 pmDCA - STL
1 stop21h 59mFrontier
Sat 5/108:15 pmSTL - DCA
1 stop14h 52mFrontier
Deal found 4/28$208
This Booking.com deal was found by Cheapflights users on 4/28. 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 5/197:45 amIAD - STL
1 stop14h 20mFrontier
Wed 5/215:45 pmSTL - IAD
1 stop17h 47mFrontier
Deal found 4/28$210
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/268:40 amIAD - STL
Nonstop2h 16mUnited Airlines
Thu 5/295:00 amSTL - IAD
1 stop5h 55mUnited Airlines
Deal found 4/28$214
This American Airlines deal was found by Cheapflights users on 4/29. 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 5/291:54 pmDCA - STL
Nonstop2h 17mAmerican Airlines
Tue 6/36:47 pmSTL - DCA
1 stop4h 12mAmerican Airlines
Deal found 4/29$215
This Delta deal was found by Cheapflights users on 4/29. 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 5/306:00 amIAD - STL
1 stop4h 35mDelta
Mon 6/25:45 pmSTL - IAD
1 stop4h 09mDelta
Deal found 4/29$224
This Delta deal was found by Cheapflights users on 4/29. 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.
Thu 5/296:00 amDCA - STL
1 stop4h 00mDelta
Tue 6/312:30 pmSTL - DCA
1 stop7h 18mDelta
Deal found 4/29$224
This American Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 6/276:55 amIAD - STL
1 stop6h 04mAmerican Airlines
Sun 6/299:04 amSTL - IAD
1 stop7h 07mAmerican Airlines
Deal found 4/28$317
This Mytrip deal was found by Cheapflights users on 4/28. 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 5/2212:49 pmIAD - STL
1 stop23h 36mMultiple Airlines
Sun 5/2510:10 amSTL - IAD
3 stops29h 05mMultiple Airlines
Deal found 4/28$348
This United Airlines deal was found by Cheapflights users on 4/29. 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 5/237:00 pmDCA - STL
1 stop4h 45mUnited Airlines
Mon 5/266:30 amSTL - DCA
1 stop4h 29mUnited Airlines
Deal found 4/29$407

Cheapflights Fare Finder

Customize your flight search to find flights from District of Columbia to St. Louis 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 April 30, 2025.
Use the filters below to find and compare flights from District of Columbia to St. Louis that are best for you.

Fly from

District of Columbia

Fly to

St. Louis

Route

Depart

Return

Price

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sat 5/24

2:25 pm-8:00 pm

1 stop6h 35m

Lambert-St Louis

Wed 5/28

7:05 pm-10:05 pm

Nonstop2h 00m

$207

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Fri 5/9

1:00 pm-9:59 am

1 stop21h 59m

Lambert-St Louis

Sat 5/10

8:15 pm-12:07 pm

1 stop14h 52m

$208

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Mon 5/19

7:45 am-9:05 pm

1 stop14h 20m

Lambert-St Louis

Wed 5/21

5:45 pm-12:32 pm

1 stop17h 47m

$210

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Mon 5/26

8:40 am-9:56 am

Nonstop2h 16m

Lambert-St Louis

Thu 5/29

5:00 am-11:55 am

1 stop5h 55m

$214

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 5/29

1:54 pm-3:11 pm

Nonstop2h 17m

Lambert-St Louis

Tue 6/3

6:47 pm-11:59 pm

1 stop4h 12m

$215

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Fri 5/30

12:53 pm-4:35 pm

1 stop4h 42m

Lambert-St Louis

Mon 6/2

5:45 pm-10:54 pm

1 stop4h 09m

$224

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 5/29

1:53 pm-6:01 pm

1 stop5h 08m

Lambert-St Louis

Tue 6/3

6:45 am-11:31 am

1 stop3h 46m

$224

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Fri 6/27

6:55 am-11:59 am

1 stop6h 04m

Lambert-St Louis

Sun 6/29

9:04 am-5:11 pm

1 stop7h 07m

$317

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 5/22

12:49 pm-11:25 am

1 stop23h 36m

Lambert-St Louis

Sun 5/25

10:10 am-4:15 pm

3 stops29h 05m

$348

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Fri 5/23

7:00 pm-10:45 pm

1 stop4h 45m

Lambert-St Louis

Mon 5/26

6:30 am-11:59 am

1 stop4h 29m

$407

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 21 results
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Best time to book a flight from District of Columbia to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from District of Columbia 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 District of Columbia to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from District of Columbia to St. Louis (average of $311). Flying from District of Columbia to St. Louis in March is currently the most expensive (average of $356). 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 DC to STL?

Find hourly flight availability from District of Columbia to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from District of Columbia to St. Louis as you normally would.

Weekly flight availability from District of Columbia to St. Louis

Explore weekly flight availability from District of Columbia to St. Louis. 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 April 30, 2025.

The most flights from USDC to STL are scheduled on a Monday (8 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, 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 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated April 30, 2025.
See what other customers who have flown with Southwest, Delta and United Airlines from District of Columbia to St. Louis have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
8.0
Very good

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Related info for your journey

Find useful and relevant information for your journey from District of Columbia to St. Louis. 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 into for flights to St. Louis from District of Columbia?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from District of Columbia.

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

    One-way options have recently been found by users for as low as $90 on United Airlines. Other airlines that offer cheap prices include American Airlines from $90 and Frontier from $94 one-way.

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

    No one likes to see their flight delayed. When booking a flight from District of Columbia to St. Louis consider choosing GoJet (82%), Avianca (82%) or Copa Airlines (82%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $88. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $181 on average our data indicates $475 when flying from District of Columbia to St. Louis.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from District of Columbia to St. Louis (average of $311). Flying from District of Columbia to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near District of Columbia?

Book flights to District of Columbia if you plan to visit one of these locations
Fenton
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
O'Fallon

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for District of Columbia to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from District of Columbia to St. Louis

Discover the top 5 airlines that operate flights from District of Columbia to St. Louis. 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$215FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$168Average$354FlexibilityNo cancel feeOn-time71%
DeltaCheapest$176Average$318FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$197Average$354FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$223Average$453FlexibilityNo cancel feeOn-time69%

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