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Washington, D.C.

$67+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — WAS
Sep 9 — Sep 161
Wed 9/9
Wed 9/16
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 August 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 8/6. 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 10/1510:35 am -
1 stop6h 59m
Wed 10/289:20 pm -
1 stop13h 20m
Deal found 8/6$136
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 10/1210:35 am -
1 stop21h 22m
Sun 10/189:29 pm -
1 stop13h 11m
Deal found 8/6$139
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Thu 10/1510:35 am -
1 stop6h 59m
Sun 10/189:29 pm -
1 stop13h 11m
Deal found 8/5$140
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 10/910:35 am -
1 stop6h 59m
Wed 10/149:29 pm -
1 stop13h 11m
Deal found 8/7$141
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/46:17 pm -
1 stop12h 09m
Fri 9/116:00 am -
1 stop8h 10m
Deal found 8/7$142
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 10/810:35 am -
1 stop6h 59m
Sun 10/119:29 pm -
1 stop13h 11m
Deal found 8/8$143
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 9/46:17 pm -
1 stop17h 07m
Sun 9/66:45 am -
1 stop11h 37m
Deal found 8/6$145
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 10/2310:35 am -
1 stop6h 59m
Sun 10/259:29 pm -
1 stop13h 11m
Deal found 8/5$146
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/252:29 pm -
1 stop7h 35m
Sun 9/279:25 pm -
1 stop16h 45m
Deal found 8/7$148
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 8/3111:26 am -
1 stop23h 58m
Sat 9/56:45 am -
1 stop10h 20m
Deal found 8/6$174
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/211:26 am -
1 stop9h 30m
Sat 9/56:45 am -
1 stop10h 20m
Deal found 8/7$197
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/55:00 pm -
1 stop18h 24m
Sun 9/69:32 pm -
1 stop14h 09m
Deal found 8/7$212

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 August 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$136
(Kiwi.com)

One-way from

$67
(Kiwi.com)

Popular in

July

Cheapest in

October

Average price

$369

Good round-trip deal

$315 or less

Good one-way deal

$174 or less
Provider with most accurate pricing for Kansas City-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Kansas City-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. 8% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 10, 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 Lambert-St Louis - DCA Washington, D.C. Reagan-National

STLDCA

Lambert-St Louis

Sat 9/5

5:23 pm-11:48 pm

1 stop5h 25m

Washington, D.C. Reagan-National

Sun 9/6

6:10 am-9:37 am

1 stop4h 27m

$257

Kansas CityBaltimore

MCI Kansas City - BWI Baltimore/Washington

MCIBWI

Kansas City

Thu 9/17

5:30 pm-10:50 pm

1 stop4h 20m

Baltimore/Washington

Tue 9/22

10:10 am-11:50 am

Nonstop2h 40m

$267
Quickest round-trip

St. LouisWashington, D.C.

STL Lambert-St Louis - DCA Washington, D.C. Reagan-National

STLDCA

Lambert-St Louis

Thu 9/3

1:10 pm-4:10 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Tue 9/8

6:50 pm-8:00 pm

Nonstop2h 10m

$279

Kansas CityWashington, D.C.

MCI Kansas City - DCA Washington, D.C. Reagan-National

MCIDCA

Kansas City

Sat 9/5

5:40 pm-11:50 pm

1 stop5h 10m

Washington, D.C. Reagan-National

Sun 9/6

6:10 am-9:45 am

1 stop4h 35m

$281

St. LouisWashington, D.C.

STL Lambert-St Louis - DCA Washington, D.C. Reagan-National

STLDCA

Lambert-St Louis

Wed 10/14

10:20 am-2:30 pm

1 stop3h 10m

Washington, D.C. Reagan-National

Wed 10/14

6:40 pm-8:05 pm

Nonstop2h 25m

$285

Kansas CityWashington, D.C.

MCI Kansas City - IAD Washington, D.C. Dulles Intl

MCIIAD

Kansas City

Thu 9/3

5:39 pm-9:18 pm

Nonstop2h 39m

Washington, D.C. Dulles Intl

Mon 9/7

5:44 pm-7:32 pm

Nonstop2h 48m

$287

St. LouisWashington, D.C.

STL Lambert-St Louis - DCA Washington, D.C. Reagan-National

STLDCA

Lambert-St Louis

Mon 10/5

1:15 pm-4:15 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Tue 10/6

1:00 pm-5:40 pm

1 stop5h 40m

$289

St. LouisWashington, D.C.

STL Lambert-St Louis - DCA Washington, D.C. Reagan-National

STLDCA

Lambert-St Louis

Thu 11/19

8:40 am-11:35 am

Nonstop1h 55m

Washington, D.C. Reagan-National

Mon 11/23

3:55 pm-8:55 pm

1 stop6h 00m

$289

Kansas CityWashington, D.C.

MCI Kansas City - DCA Washington, D.C. Reagan-National

MCIDCA

Kansas City

Fri 8/28

2:50 pm-8:50 pm

1 stop5h 00m

Washington, D.C. Reagan-National

Mon 8/31

8:20 pm-10:05 pm

Nonstop2h 45m

$293

Kansas CityWashington, D.C.

MCI Kansas City - DCA Washington, D.C. Reagan-National

MCIDCA

Kansas City

Fri 9/4

1:08 pm-7:09 pm

1 stop5h 01m

Washington, D.C. Reagan-National

Sun 9/6

6:30 am-10:25 am

1 stop4h 55m

$294

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/8

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, October is the cheapest month in which you can book a flight from Missouri to Washington, D.C. (average of $319). Flying from Missouri to Washington, D.C. in July is currently the most expensive (average of $422). 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 August 10, 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 15% versus a flight in the morning.

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 August 10, 2026.

The most flights from USMO to WAS are scheduled on a Monday (14 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

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

Airfare is below average for this route at the moment.
Missouri to Washington, D.C. flights typically cost between $253 and $421 in October.
The cheapest round-trip price found within the last 5 days was $136 on Frontier (Oct 15-Oct 28).

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 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 August 1, 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 Delta, Southwest, and United Airlines fly from Missouri to Washington, D.C. in about 2h 39m. The time it takes to get you to your destination can typically vary by up to 2h 46m. Airlines will cover a distance of 924 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 Frontier ($72), American Airlines ($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, Lambert-St Louis - Baltimore/Washington or Lambert-St Louis - Washington, D.C. Reagan-National as they are the most popular.

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

    Consider Avianca (93%), Copa Airlines (93%) or GoJet (91%) 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 $1,017, our data shows the cheapest flight currently is $159. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl), you can expect to pay $226 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, October is the cheapest month in which you can book a flight from Missouri to Washington, D.C. (average of $319). Flying from Missouri to Washington, D.C. in July is currently the most expensive (average of $422). 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
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Oxon Hill
Clinton
Hunt Valley
Woodbridge
Silver Spring
Largo

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
O'Hare Intl to Dulles Intl flights
Atlanta to Dulles Intl flights
Los Angeles to Reagan-National flights
San Francisco to Dulles Intl flights
Atlanta to Reagan-National flights
O'Hare Intl to Reagan-National flights
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San Francisco to Reagan-National flights
Boston to Reagan-National flights
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Miami to Reagan-National flights
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Hobby to Reagan-National flights
Minneapolis to Dulles Intl flights
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Minneapolis to Reagan-National flights
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Midway to Dulles Intl flights
George Bush Intcntl to Dulles Intl flights
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Denver to Reagan-National flights
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John F Kennedy Intl to Dulles Intl flights
LaGuardia to Reagan-National flights
Miami to Dulles Intl flights
Detroit to Reagan-National flights
Indianapolis to Dulles Intl flights
Ontario to Reagan-National flights
Detroit to Dulles Intl flights
Indianapolis to Reagan-National flights
Portland to Dulles Intl flights
Newark to Dulles Intl flights
Raleigh to Dulles Intl flights
Sky Harbor Intl to Reagan-National flights
LaGuardia to Dulles Intl flights
Fort Lauderdale to Reagan-National flights
Salt Lake City to Dulles Intl flights
Providence 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 August 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$200FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$375FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$158Average$390FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$212Average$412FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$232Average$407FlexibilityNo cancel feeOn-time63%

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