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Washington, D.C.

$59+ Cheap flights from Missouri to Washington, D.C. (WAS)

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — WAS
Jun 5 — Jun 121
Fri 6/5
Fri 6/12
1 adult, Economy
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Cheap flight deals from Missouri to Washington, D.C.

Cheapest flights from Missouri to Washington, D.C.
Explore the most affordable flight options available from Missouri to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 6, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/265:06 pm
STL
-
BWI
1 stop13h 39m
Frontier
Mon 6/299:32 pm
BWI
-
STL
1 stop20h 58m
Frontier
Deal found 5/5$124
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/195:06 pm
STL
-
BWI
1 stop13h 39m
Frontier
Fri 6/269:32 pm
BWI
-
STL
1 stop12h 20m
Frontier
Deal found 5/5$125
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Mon 6/89:23 pm
BWI
-
STL
1 stop21h 07m
Frontier
Deal found 5/4$126
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:24 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Fri 6/57:23 pm
BWI
-
MCI
1 stop23h 06m
Frontier
Deal found 5/2$126
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Tue 6/28:52 am
BWI
-
STL
1 stop9h 41m
Frontier
Deal found 5/3$127
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:33 pm
STL
-
BWI
1 stop12h 10m
Frontier
Mon 6/19:23 pm
BWI
-
STL
1 stop21h 10m
Frontier
Deal found 5/3$128
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:24 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Tue 6/96:27 pm
BWI
-
MCI
1 stop23h 54m
Frontier
Deal found 5/5$128
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:33 pm
STL
-
BWI
1 stop12h 10m
Frontier
Sun 5/317:07 pm
BWI
-
STL
1 stop14h 48m
Frontier
Deal found 5/5$129
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Sun 6/76:45 am
BWI
-
STL
1 stop27h 10m
Frontier
Deal found 5/1$130
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:33 pm
STL
-
BWI
1 stop12h 10m
Frontier
Fri 5/299:23 pm
BWI
-
STL
1 stop12h 32m
Frontier
Deal found 5/5$132
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:24 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Mon 6/86:45 am
BWI
-
MCI
1 stop11h 44m
Frontier
Deal found 5/3$132
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Fri 5/298:52 am
BWI
-
STL
1 stop25h 03m
Frontier
Deal found 5/5$135

Find flight deals from Missouri to Washington, D.C.

Keep the following information in mind while searching for Missouri to Washington, D.C. flight deals. Data was last updated May 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$124
(Kiwi.com)

One-way from

$59
(Trip.com)

Popular in

February

Cheapest in

August

Average price

$300

Good round-trip deal

$341 or less

Good one-way deal

$158 or less
Provider with most accurate pricing for Lambert-St Louis-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Washington, D.C. (WAS) flights.
Search Deals
From Missouri to Washington, D.C. (WAS)
Search Deals
One-way flight from Missouri to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Missouri to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Missouri to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Washington, D.C. 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 May 6, 2026.
Use the filters below to find and compare flights from Missouri to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Wed 7/1

7:55 pm-10:55 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Tue 7/7

11:45 am-2:50 pm

1 stop4h 05m

$253

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 5/28

7:40 pm-10:40 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Mon 6/1

3:35 pm-6:40 pm

1 stop4h 05m

$271

SpringfieldBaltimore

SGF - BWI

SGFBWI

Springfield-Branson

Tue 6/2

6:49 pm-12:47 am

1 stop4h 58m

Baltimore/Washington

Tue 6/9

2:10 pm-6:12 pm

1 stop5h 02m

$275

SpringfieldBaltimore

SGF - BWI

SGFBWI

Springfield-Branson

Wed 6/3

6:49 pm-12:47 am

1 stop4h 58m

Baltimore/Washington

Tue 6/9

2:10 pm-6:12 pm

1 stop5h 02m

$275

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 5/29

7:40 pm-10:40 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Wed 6/10

11:45 am-2:50 pm

1 stop4h 05m

$282

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sun 5/24

1:13 pm-7:10 pm

1 stop4h 57m

Washington, D.C. Reagan-National

Tue 5/26

11:57 am-3:46 pm

1 stop4h 49m

$296

Kansas CityWashington, D.C.

MCI - DCA

MCIDCA

Kansas City

Wed 5/27

2:55 pm-10:45 pm

1 stop6h 50m

Washington, D.C. Reagan-National

Sat 5/30

7:15 am-9:00 am

Nonstop2h 45m

$297

ColumbiaWashington, D.C.

COU - DCA

COUDCA

Columbia Regional

Wed 8/19

3:05 pm-8:43 pm

1 stop4h 38m

Washington, D.C. Reagan-National

Sun 8/23

6:00 pm-9:49 pm

1 stop4h 49m

$298

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

Tue 6/2

6:49 pm-12:51 am

1 stop5h 02m

Washington, D.C. Dulles Intl

Tue 6/9

12:37 pm-6:12 pm

1 stop6h 35m

$299

SpringfieldWashington, D.C.

SGF - IAD

SGFIAD

Springfield-Branson

Wed 6/3

6:49 pm-12:51 am

1 stop5h 02m

Washington, D.C. Dulles Intl

Tue 6/9

12:37 pm-6:12 pm

1 stop6h 35m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/5

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Missouri to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Missouri 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 Missouri to Washington, D.C.

How far ahead should I book a flight from Missouri to Washington, D.C.?

The best time to book flights from Missouri to Washington, D.C. is 61 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Missouri to Washington, D.C.?

Currently, August is the cheapest month in which you can book a flight from Missouri to Washington, D.C. (average of $67). Flying from Missouri to Washington, D.C. in September is currently the most expensive (average of $151). 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 MO to WAS?

Find hourly flight availability from Missouri to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 6, 2026.

When flying from Missouri to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 34% versus a flight at noon.

What is the cheapest day to fly from Missouri to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Missouri to Washington, D.C.. Price data was last updated on May 2, 2026.

Travelers seeking maximum savings on their Missouri to Washington, D.C. flight should consider departing on Sunday evenings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Missouri to Washington, D.C.

Explore weekly flight availability from Missouri to Washington, D.C.. 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 May 6, 2026.

The most flights from USMO to WAS are scheduled on a Monday (14 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

How much does it cost to fly round-trip from Missouri to Washington, D.C.?

Related info for your journey

Find useful and relevant information for your journey from Missouri to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Missouri to Washington, D.C.?

    Airlines like Southwest, Delta, and United Airlines fly from Missouri to Washington, D.C. in about 2h. The time it takes to get you to your destination can typically vary by up to 4h 30m. Airlines will cover a distance of 717 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Missouri to Washington, D.C. one-way?

    The cheapest airlines for a one-way flight from Missouri to Washington, D.C. are American Airlines ($67), Frontier ($72), and Southwest ($89).

  • What are the most popular routes from Missouri to Washington, D.C.?

    When deciding which route to take from Missouri to Washington, D.C. consider Lambert-St Louis - Washington, D.C. Dulles Intl, Kansas City - Washington, D.C. Dulles Intl or Lambert-St Louis - Baltimore/Washington as they are the most popular.

  • What are the most reliable airlines from Missouri to Washington, D.C.?

    Consider Avianca (82%), Copa Airlines (76%) or GoJet (76%) when booking your flight. These represent the most reliable airlines when flying from Missouri to Washington, D.C..

  • What are the cheapest flights from Missouri to Washington, D.C.?

    While on average a flight from Missouri to Washington, D.C. is generally $1,260, our data shows the cheapest flight currently is $172. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl), you can expect to pay $221 for that flight.

  • Can I find deals for flights from Missouri to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Missouri to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Missouri to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missouri to Washington, D.C..

  • Can I find deals for business class flights from Missouri to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Missouri to Washington, D.C. 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 Missouri to Washington, D.C.?

    Currently, August is the cheapest month in which you can book a flight from Missouri to Washington, D.C. (average of $67). Flying from Missouri to Washington, D.C. in September is currently the most expensive (average of $151). 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Tysons
Owings Mills
Springfield
Arlington
Silver Spring
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Woodbridge
Hanover
Laurel
Largo
Upper Marlboro
Waldorf
Clinton
Hunt Valley
Cordova

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Missouri to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Dulles Intl flights
Los Angeles to Reagan-National flights
Los Angeles to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
San Francisco to Dulles Intl flights
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San Francisco to Reagan-National flights
O'Hare Intl to Dulles Intl flights
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Boston to Reagan-National flights
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Seattle to Reagan-National flights
O'Hare Intl to Reagan-National flights
George Bush Intcntl to Dulles Intl flights
George Bush Intcntl to Reagan-National flights
Orlando to Reagan-National flights
Atlanta to Reagan-National flights
Tampa to Dulles Intl flights
Minneapolis to Dulles Intl flights
Austin to Dulles Intl flights
Miami to Reagan-National flights
San Diego to Dulles Intl flights
Miami to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
Minneapolis to Reagan-National flights
Ontario to Dulles Intl flights
Denver to Reagan-National flights
John F Kennedy Intl to Dulles Intl flights
LaGuardia to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Portland to Dulles Intl flights
Midway to Dulles Intl flights
Austin to Reagan-National flights
Ontario to Reagan-National flights
Salt Lake City to Dulles Intl flights
Fort Lauderdale to Reagan-National flights
Sky Harbor Intl to Reagan-National flights
Detroit to Dulles Intl flights
Love Field to Reagan-National flights
Detroit to Reagan-National flights
San Diego to Reagan-National flights
LaGuardia to Dulles Intl flights
Charlotte to Dulles Intl flights
Tampa to Reagan-National flights
Salt Lake City to Reagan-National flights

Top 6 airlines flying from Missouri to Washington, D.C.

Discover the top 6 airlines that operate flights from Missouri to Washington, D.C.. 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 May 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$80Average$197FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$96Average$263FlexibilityNo cancel feeOn-time65%
DeltaCheapest$99Average$350FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$149Average$390FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$163Average$428FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$382FlexibilityNo cancel feeOn-time63%

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