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$105+ 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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — STL
Aug 6 — Aug 131
Mi 8/6
Mi 8/13
1 adult, Economy
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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 August 1, 2025.

Round-trip from

$208
(Frontier)

One-way from

$105
(Frontier)

Popular in

March

Cheapest in

August

Average price

$277

Good round-trip deal

$218 or less

Good one-way deal

$129 or less
From District of Columbia to Lambert-St Louis
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One-way flight from District of Columbia to Lambert-St Louis
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Highest demand for flights based on searches. 7% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from District of Columbia to Lambert-St Louis.
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Price to beat on a one-way flight from District of Columbia to Lambert-St Louis.
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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 August 1, 2025.

This Frontier deal was found by Cheapflights users on 7/31. 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.
Sa 8/161:37 pmIAD - STL
1 stop11h 10mFrontier
Mo 8/182:37 pmSTL - IAD
1 stop14h 57mFrontier
Deal found 7/31$208
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Mi 8/278:40 amIAD - STL
Nonstop2h 22mUnited Airlines
Mi 9/38:15 amSTL - IAD
Nonstop2h 10mUnited Airlines
Deal found 7/30$217
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Mi 9/108:30 amDCA - STL
Nonstop2h 51mAmerican Airlines
Sa 9/137:01 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Deal found 7/30$217
This CheapOair deal was found by Cheapflights users on 7/31. 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.
Mi 10/151:00 pmDCA - STL
1 stop21h 07mFrontier
Sa 10/187:52 pmSTL - DCA
1 stop15h 12mFrontier
Deal found 7/31$218
This Southwest deal was found by Cheapflights users on 7/30. 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.
Sa 8/236:40 pmDCA - STL
Nonstop2h 10mSouthwest
Mi 9/311:10 amSTL - DCA
1 stop5h 05mSouthwest
Deal found 7/30$227
This Delta deal was found by Cheapflights users on 7/31. 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.
Mi 12/37:00 amIAD - STL
1 stop6h 57mDelta
Sa 12/610:45 amSTL - IAD
1 stop4h 46mDelta
Deal found 7/31$237
This Delta deal was found by Cheapflights users on 7/31. 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.
Sa 10/116:00 amDCA - STL
1 stop4h 15mDelta
Do 10/164:10 pmSTL - DCA
1 stop5h 54mDelta
Deal found 7/31$254
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Do 8/286:34 amIAD - STL
1 stop6h 37mAmerican Airlines
Sa 8/305:27 amSTL - IAD
1 stop6h 21mAmerican Airlines
Deal found 7/29$271
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Mi 9/1010:30 amDCA - STL
1 stop4h 49mUnited Airlines
Mi 9/176:35 amSTL - DCA
1 stop4h 24mUnited Airlines
Deal found 7/29$292

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 August 1, 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

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sa 8/16

1:37 pm-11:47 pm

1 stop11h 10m

Lambert-St Louis

Mo 8/18

2:37 pm-6:34 am

1 stop14h 57m

$208

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Mi 8/27

8:40 am-10:02 am

Nonstop2h 22m

Lambert-St Louis

Mi 9/3

8:15 am-11:25 am

Nonstop2h 10m

$217

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Mi 9/10

8:30 am-10:21 am

Nonstop2h 51m

Lambert-St Louis

Sa 9/13

7:01 am-10:03 am

Nonstop2h 02m

$217

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Mi 10/15

1:00 pm-9:07 am

1 stop21h 07m

Lambert-St Louis

Sa 10/18

7:52 pm-12:04 pm

1 stop15h 12m

$218

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sa 8/23

6:40 pm-7:50 pm

Nonstop2h 10m

Lambert-St Louis

Mi 9/3

11:10 am-5:15 pm

1 stop5h 05m

$227

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Mi 8/27

7:22 am-12:31 pm

1 stop6h 09m

Lambert-St Louis

Mi 9/3

6:00 am-11:23 am

1 stop4h 23m

$237

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sa 10/11

6:00 am-9:15 am

1 stop4h 15m

Lambert-St Louis

Do 10/16

4:10 pm-11:04 pm

1 stop5h 54m

$254

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Do 8/28

6:34 am-12:11 pm

1 stop6h 37m

Lambert-St Louis

Sa 8/30

5:27 am-12:48 pm

1 stop6h 21m

$271

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Mi 9/10

10:30 am-2:19 pm

1 stop4h 49m

Lambert-St Louis

Mi 9/17

6:35 am-11:59 am

1 stop4h 24m

$292

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sa 8/9

6:10 am-1:59 pm

1 stop8h 49m

$105

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 20 results
1
2

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 August 1, 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.

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 August 1, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from District of Columbia to St. Louis. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.9
Fair
3,239 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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.

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

    Flights from District of Columbia to Lambert-St Louis have been viewed 20 times in the past calendar month.

  • 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 $105 on Frontier. Other airlines that offer cheap prices include American Airlines from $109 and Delta from $119 one-way.

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

    Looking at all options, your cheapest flight can be booked for $98. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $209 on average our data indicates $288 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 St. Louis?

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

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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.
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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 August 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$109Average$175FlexibilityNo cancel feeOn-time62%
DeltaCheapest$141Average$279FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$158Average$314FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$189Average$346FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$254Average$477FlexibilityNo cancel feeOn-time69%

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