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Washington, D.C.

$56+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — WAS
Nov 20 — Nov 271
Thu 11/20
Thu 11/27
1 adult, Economy
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Find 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 October 21, 2025.

This Priceline deal was found by Cheapflights users on 10/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/314:52 pmSTL - BWI
1 stop6h 26mFrontier
Sun 11/25:00 amBWI - STL
1 stop5h 12mFrontier
Deal found 10/19$144
This Frontier deal was found by Cheapflights users on 10/19. 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.
Thu 11/1311:12 amMCI - BWI
1 stop11h 55mFrontier
Sun 11/165:50 amBWI - MCI
1 stop5h 27mFrontier
Deal found 10/19$144
This Booking.com deal was found by Cheapflights users on 10/19. 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 11/310:25 amSTL - BWI
1 stop22h 55mFrontier
Fri 11/79:11 pmBWI - STL
1 stop19h 27mFrontier
Deal found 10/19$145
This Booking.com deal was found by Cheapflights users on 10/19. 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.
Thu 11/132:12 pmSTL - BWI
1 stop17h 22mFrontier
Fri 11/149:11 pmBWI - STL
1 stop19h 27mFrontier
Deal found 10/19$146
This Cheapflightsfares deal was found by Cheapflights users on 10/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/43:47 pmMCI - BWI
1 stop7h 40mSpirit Airlines
Mon 12/810:40 amBWI - MCI
1 stop13h 26mSpirit Airlines
Deal found 10/20$148
This American Airlines deal was found by Cheapflights users on 10/21. 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 12/112:09 pmSTL - BWI
1 stop7h 03mAmerican Airlines
Sun 1/119:17 amBWI - STL
1 stop6h 47mAmerican Airlines
Deal found 10/21$149
This American Airlines deal was found by Cheapflights users on 10/21. 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.
Sat 12/62:56 pmMCI - BWI
1 stop5h 21mAmerican Airlines
Mon 12/87:21 pmBWI - MCI
1 stop5h 24mAmerican Airlines
Deal found 10/21$149
This Booking.com deal was found by Cheapflights users on 10/20. 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.
Thu 11/132:12 pmSTL - BWI
1 stop17h 22mFrontier
Sat 11/1510:16 amBWI - STL
1 stop6h 22mFrontier
Deal found 10/20$152
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 11/144:56 pmSTL - BWI
1 stop21h 39mMultiple Airlines
Wed 11/192:00 pmBWI - STL
1 stop10h 01mMultiple Airlines
Deal found 10/20$153
This Frontier deal was found by Cheapflights users on 10/20. 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.
Fri 11/144:56 pmSTL - BWI
1 stop6h 17mFrontier
Sun 11/165:50 amBWI - STL
1 stop5h 22mFrontier
Deal found 10/20$156
This Frontier deal was found by Cheapflights users on 10/20. 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.
Fri 12/512:13 pmMCI - BWI
1 stop11h 11mFrontier
Mon 12/85:45 amBWI - MCI
1 stop7h 06mFrontier
Deal found 10/20$156
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 11/1311:07 amSTL - BWI
1 stop8h 24mMultiple Airlines
Wed 11/192:00 pmBWI - STL
1 stop10h 01mMultiple Airlines
Deal found 10/20$157

Cheap 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 October 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$144
(Priceline)

One-way from

$56
(Orbitz)

Popular in

March

Cheapest in

August

Average price

$328

Good round-trip deal

$300 or less

Good one-way deal

$165 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. 10% potential increase in price ($33 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 October 2025
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 October 21, 2025.
Use the filters below to find and compare flights from Missouri to Washington, D.C. that are best for you.

Fly from

Missouri

Fly to

Washington, D.C.

Route

Depart

Return

Price

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Thu 12/4

3:47 pm-12:27 am

1 stop7h 40m

Baltimore/Washington

Mon 12/8

10:40 am-11:06 pm

1 stop13h 26m

$148

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Sat 2/14

7:30 am-12:25 pm

1 stop3h 55m

Baltimore/Washington

Fri 2/20

8:13 pm-11:32 pm

1 stop4h 19m

$159

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 12/16

7:05 am-12:46 pm

1 stop4h 41m

Baltimore/Washington

Mon 1/12

5:30 pm-8:39 pm

1 stop4h 09m

$177

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 12/30

1:22 pm-8:11 pm

1 stop5h 49m

Baltimore/Washington

Thu 1/1

7:05 am-12:24 pm

1 stop6h 19m

$177

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Sat 12/13

6:51 pm-9:35 am

1 stop13h 44m

Baltimore/Washington

Mon 12/15

10:40 am-11:06 pm

1 stop13h 26m

$192

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Sat 12/6

6:51 pm-9:35 am

1 stop13h 44m

Baltimore/Washington

Mon 12/8

6:30 am-11:06 pm

2 stops17h 36m

$218

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Mon 11/10

12:09 pm-10:24 am

2 stops21h 15m

Baltimore/Washington

Wed 11/12

2:00 pm-10:12 am

1 stop21h 12m

$229

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 11/7

7:45 pm-1:02 pm

1 stop16h 17m

Washington, D.C. Reagan-National

Wed 11/12

2:00 pm-9:07 am

1 stop20h 07m

$230

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Wed 12/17

3:30 pm-11:14 pm

1 stop6h 44m

Baltimore/Washington

Mon 1/12

6:42 pm-10:04 am

2 stops40h 22m

$233

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 2/14

8:30 am-11:40 am

Nonstop2h 10m

Washington, D.C. Dulles Intl

Fri 2/20

8:40 am-10:13 am

Nonstop2h 33m

$244

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 60 results
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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, December is the cheapest month in which you can book a flight from Missouri to Washington, D.C. (average of $98). Flying from Missouri to Washington, D.C. in June 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 October 21, 2025.

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 evening, which can drop the price by up to 48% 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 December 16, 2024.

Travelers seeking maximum savings on their Missouri to Washington, D.C. flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday mornings 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 October 21, 2025.

The most flights from USMO to WAS are scheduled on a Monday (15 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (1 on average).

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 Spirit Airlines, American Airlines, and Delta fly from Missouri to Washington, D.C. in about 3h 55m. The time it takes to get you to your destination can typically vary by up to 3h 45m. Airlines will cover a distance of 736 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 ($73), United Airlines ($73), and Southwest ($75).

  • 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 - Washington, D.C. Reagan-National as they are the most popular.

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

    Consider Copa Airlines (85%), Avianca (85%) or Lufthansa (80%) 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 $894, our data shows the cheapest flight currently is $198. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl), you can expect to pay $173 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, December is the cheapest month in which you can book a flight from Missouri to Washington, D.C. (average of $98). Flying from Missouri to Washington, D.C. in June 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
Woodbridge
Tysons
Arlington
Springfield
Silver Spring
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf

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.
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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 October 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$106Average$199FlexibilityNo cancel feeOn-time62%
DeltaCheapest$124Average$322FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$138Average$308FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$152Average$386FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$198Average$358FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$233Average$452FlexibilityNo cancel feeOn-time69%

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