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Washington, D.C.

$72+ 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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — WAS
Jul 27 — Aug 31
Mon 7/27
Mon 8/3
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 June 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/154:57 pm
STL
-
BWI
1 stop5h 20m
Frontier
Tue 7/288:36 am
BWI
-
STL
1 stop10h 01m
Frontier
Deal found 6/23$144
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/176:07 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Tue 7/219:37 pm
BWI
-
MCI
1 stop20h 33m
Frontier
Deal found 6/24$144
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 8/74:57 pm
STL
-
BWI
1 stop13h 29m
Frontier
Wed 8/129:32 pm
BWI
-
STL
1 stop21h 05m
Frontier
Deal found 6/25$146
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/216:34 pm
STL
-
BWI
1 stop11h 52m
Frontier
Tue 7/287:07 pm
BWI
-
STL
1 stop14h 50m
Frontier
Deal found 6/24$147
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 7/246:07 pm
MCI
-
BWI
1 stop28h 10m
Frontier
Wed 7/296:35 am
BWI
-
MCI
1 stop11h 35m
Frontier
Deal found 6/25$147
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/136:07 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Wed 7/158:36 am
BWI
-
MCI
1 stop9h 34m
Frontier
Deal found 6/22$156
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 8/84:57 pm
STL
-
BWI
1 stop5h 20m
Frontier
Mon 8/107:21 pm
BWI
-
STL
1 stop23h 16m
Frontier
Deal found 6/22$157
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 9/116:11 pm
MCI
-
BWI
1 stop13h 18m
Frontier
Mon 9/149:24 am
BWI
-
MCI
1 stop8h 52m
Frontier
Deal found 6/24$158
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/216:34 pm
STL
-
BWI
1 stop11h 52m
Frontier
Sat 7/259:37 pm
BWI
-
STL
1 stop21h 00m
Frontier
Deal found 6/23$159
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/76:07 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Mon 8/108:25 am
BWI
-
MCI
1 stop9h 45m
Frontier
Deal found 6/23$159
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 8/74:57 pm
STL
-
BWI
1 stop13h 29m
Frontier
Mon 8/109:32 pm
BWI
-
STL
1 stop21h 05m
Frontier
Deal found 6/24$161
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 8/2411:26 am
MCI
-
BWI
1 stop19h 00m
Frontier
Thu 8/278:45 am
BWI
-
MCI
1 stop26h 56m
Frontier
Deal found 6/24$161

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 June 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$144
(Kiwi.com)

One-way from

$72
(Trip.com)

Popular in

May

Cheapest in

August

Average price

$376

Good round-trip deal

$329 or less

Good one-way deal

$168 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 ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 27, 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

Sat 8/8

9:00 am-6:40 pm

2 stops8h 40m

Washington, D.C. Reagan-National

Mon 8/10

6:50 am-1:05 pm

1 stop7h 15m

$270

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Wed 8/26

7:25 am-1:58 pm

1 stop5h 33m

Baltimore/Washington

Sat 8/29

8:10 am-2:57 pm

1 stop7h 47m

$271

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Sat 8/8

5:45 pm-9:26 pm

Nonstop2h 41m

Washington, D.C. Dulles Intl

Tue 8/11

5:45 pm-11:59 pm

1 stop7h 14m

$271

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 8/22

8:00 am-1:55 pm

1 stop4h 55m

Washington, D.C. Dulles Intl

Sat 8/29

8:25 am-9:39 am

Nonstop2h 14m

$274

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Sat 7/18

5:25 am-8:50 am

Nonstop2h 25m

Baltimore/Washington

Tue 7/21

6:55 pm-8:40 pm

Nonstop2h 45m

$277

Kansas CityWashington, D.C.

MCI - DCA

MCIDCA

Kansas City

Sat 7/18

5:34 pm-11:52 pm

1 stop5h 18m

Washington, D.C. Reagan-National

Sat 7/25

2:00 pm-8:23 pm

1 stop7h 23m

$281

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Wed 8/26

8:00 am-11:05 am

Nonstop2h 05m

Baltimore/Washington

Sat 8/29

10:45 am-1:35 pm

1 stop3h 50m

$284

Kansas CityWashington, D.C.

MCI - DCA

MCIDCA

Kansas City

Thu 9/24

2:50 pm-8:50 pm

1 stop5h 00m

Washington, D.C. Reagan-National

Sat 9/26

6:55 am-8:40 am

Nonstop2h 45m

$284

Kansas CityWashington, D.C.

MCI - DCA

MCIDCA

Kansas City

Tue 8/11

9:20 am-4:05 pm

1 stop5h 45m

Washington, D.C. Reagan-National

Sat 8/15

6:05 am-3:45 pm

2 stops10h 40m

$286

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Tue 8/4

11:20 am-2:45 pm

Nonstop2h 25m

Baltimore/Washington

Sat 8/8

9:50 am-1:25 pm

1 stop4h 35m

$287

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/21

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.

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 July is currently the most expensive (average of $198). 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 June 27, 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 32% versus a flight at noon.

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 June 27, 2026.

The most flights from USMO to WAS are scheduled on a Thursday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip 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 50 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 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 June 20, 2026.

Travelers seeking maximum savings on their Missouri to Washington, D.C. flight should consider departing on Thursday 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.

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, United Airlines, and Delta fly from Missouri to Washington, D.C. in about 5h 18m. The time it takes to get you to your destination can typically vary by up to 3h 22m. Airlines will cover a distance of 947 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 Delta ($108).

  • 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 Mesa Airlines (89%), Avianca (89%) or Copa Airlines (88%) 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 $730, our data shows the cheapest flight currently is $140. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl), you can expect to pay $238 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 July is currently the most expensive (average of $198). 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
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Falls Church
Laurel
Fredericksburg
Hanover
Manassas
Waldorf
Silver Spring
Largo
Clinton
Hunt Valley

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
Dallas/Fort Worth to Reagan-National flights
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San Francisco to Reagan-National flights
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Orlando to Reagan-National flights
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Minneapolis to Reagan-National flights
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Minneapolis to Dulles Intl flights
Fort Lauderdale to Reagan-National flights
Ontario to Reagan-National flights
Miami to Reagan-National flights
Austin to Dulles Intl flights
John F Kennedy Intl to Dulles Intl flights
Denver to Reagan-National flights
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Austin to Reagan-National flights
San Diego to Dulles Intl flights
Newark to Dulles Intl flights
Midway to Dulles Intl flights
Portland to Dulles Intl flights
Detroit to Dulles Intl flights
San Jose to Dulles Intl flights
John F Kennedy Intl to Reagan-National flights
LaGuardia to Reagan-National flights
Sky Harbor Intl to Reagan-National flights
LaGuardia to Dulles Intl flights
Nashville to Reagan-National flights
Newark to Reagan-National flights
St. Louis to Dulles Intl flights

Top 5 airlines flying from Missouri to Washington, D.C.

Discover the top 5 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 June 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$80Average$193FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$367FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$158Average$391FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$396FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$244Average$426FlexibilityNo cancel feeOn-time69%

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