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Washington, D.C.

$55+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — WAS
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
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 February 4, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Fri 3/61:09 pm
STL
-
BWI
1 stop25h 49m
Frontier
Tue 3/103:19 pm
BWI
-
STL
1 stop20h 18m
Frontier
Deal found 2/3$119
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Fri 3/61:09 pm
STL
-
BWI
1 stop25h 49m
Frontier
Mon 3/165:31 am
BWI
-
STL
1 stop9h 03m
Frontier
Deal found 2/3$125
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/92:09 pm
STL
-
BWI
1 stop9h 34m
Frontier
Tue 3/103:19 pm
BWI
-
STL
1 stop20h 18m
Frontier
Deal found 2/2$131
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Tue 3/33:49 pm
STL
-
BWI
1 stop26h 41m
Frontier
Tue 3/103:19 pm
BWI
-
STL
1 stop20h 18m
Frontier
Deal found 2/1$132
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Fri 3/61:09 pm
STL
-
BWI
1 stop25h 49m
Frontier
Mon 3/95:31 am
BWI
-
STL
1 stop8h 48m
Frontier
Deal found 2/2$133
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Fri 3/65:08 pm
MCI
-
BWI
1 stop21h 50m
Frontier
Fri 3/135:31 am
BWI
-
MCI
1 stop13h 07m
Frontier
Deal found 2/4$146
This WAYA deal was found by Cheapflights users on 2/4. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/65:08 pm
MCI
-
BWI
1 stop6h 23m
Frontier
Wed 3/116:05 am
BWI
-
MCI
1 stop5h 53m
Frontier
Deal found 2/4$148
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 2/2011:00 am
MCI
-
BWI
1 stop12h 31m
Frontier
Sun 2/226:50 pm
BWI
-
MCI
1 stop16h 03m
Frontier
Deal found 2/1$154
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Fri 3/65:08 pm
MCI
-
BWI
1 stop21h 50m
Multiple Airlines
Sun 3/89:43 pm
BWI
-
MCI
1 stop13h 47m
Multiple Airlines
Deal found 2/3$155
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Wed 3/1111:32 am
STL
-
BWI
1 stop12h 09m
Frontier
Fri 3/135:31 am
BWI
-
STL
1 stop9h 03m
Frontier
Deal found 2/2$156
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Wed 4/228:13 pm
STL
-
BWI
1 stop10h 59m
Frontier
Sun 4/266:05 am
BWI
-
STL
1 stop25h 45m
Frontier
Deal found 2/2$161
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Fri 3/61:09 pm
STL
-
BWI
1 stop25h 49m
Frontier
Fri 3/135:31 am
BWI
-
STL
1 stop9h 03m
Frontier
Deal found 2/2$162

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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$119
(Kiwi.com)

One-way from

$55
(Trip.com)

Popular in

January

Cheapest in

August

Average price

$304

Good round-trip deal

$303 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. 11% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 4, 2026.
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

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Mon 3/30

5:59 pm-11:01 pm

1 stop4h 02m

Baltimore/Washington

Tue 3/31

11:52 am-5:53 pm

1 stop7h 01m

$197

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Mon 7/13

5:30 pm-12:15 am

1 stop5h 45m

Baltimore/Washington

Wed 7/15

10:00 am-2:37 pm

1 stop5h 37m

$197

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 7/21

7:20 am-1:06 pm

1 stop4h 46m

Baltimore/Washington

Mon 7/27

7:40 pm-11:38 pm

1 stop4h 58m

$197

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Thu 5/7

6:30 am-11:38 am

1 stop4h 08m

Baltimore/Washington

Mon 5/11

4:51 pm-10:23 pm

1 stop6h 32m

$197

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Wed 3/4

1:23 pm-10:02 pm

1 stop7h 39m

Baltimore/Washington

Wed 3/11

4:43 pm-10:04 pm

1 stop6h 21m

$201

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 2/19

6:00 am-11:18 am

1 stop4h 18m

Baltimore/Washington

Sun 2/22

5:00 am-10:03 am

1 stop6h 03m

$205

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Fri 2/20

4:12 pm-11:47 pm

1 stop6h 35m

Baltimore/Washington

Sun 2/22

6:00 am-9:54 am

1 stop4h 54m

$205

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Thu 2/19

5:47 pm-10:53 pm

1 stop4h 06m

Baltimore/Washington

Mon 2/23

4:45 pm-9:58 pm

1 stop6h 13m

$205

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Wed 2/18

10:41 am-4:38 pm

1 stop4h 57m

Baltimore/Washington

Sat 2/21

5:30 pm-11:40 pm

1 stop7h 10m

$205

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 2/19

3:49 pm-6:14 pm

1 stop25h 25m

Baltimore/Washington

Fri 2/20

8:39 pm-6:51 am

1 stop11h 12m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

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 $199). 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 February 4, 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 evening, which can drop the price by up to 53% 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 January 31, 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 February 4, 2026.

The most flights from USMO to WAS are scheduled on a Monday (13 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 Delta, American Airlines, and Frontier fly from Missouri to Washington, D.C. in about 4h 02m. The time it takes to get you to your destination can typically vary by up to 21h 23m. 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 Frontier ($63), American Airlines ($69), 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. Reagan-National or Kansas City - Washington, D.C. Dulles Intl as they are the most popular.

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

    Consider Avianca (74%), Copa Airlines (74%) or GoJet (69%) 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 $618, our data shows the cheapest flight currently is $154. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl), you can expect to pay $277 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 $199). 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
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Upper Marlboro
Manassas
Largo
Bowie
McLean
Clinton

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
Boston to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
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Boston to Reagan-National flights
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San Francisco to Reagan-National flights
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San Francisco to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
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George Bush Intcntl to Reagan-National flights
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George Bush Intcntl to Dulles Intl flights
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Austin to Dulles Intl flights
Orlando to Reagan-National flights
Denver to Dulles Intl flights
Denver to Reagan-National flights
LaGuardia to Reagan-National flights
Tampa to Reagan-National flights
Sky Harbor Intl to Dulles Intl flights
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Minneapolis to Reagan-National flights
Austin to Reagan-National flights
Detroit to Reagan-National flights
Ontario to Dulles Intl flights
Minneapolis to Dulles Intl flights
Midway to Dulles Intl flights
Fort Lauderdale to Reagan-National flights
John F Kennedy Intl to Dulles Intl flights
LaGuardia to Dulles Intl flights
John F Kennedy Intl to Reagan-National flights
Ontario to Reagan-National flights
Raleigh to Reagan-National flights
Nashville to Reagan-National flights
Sky Harbor Intl to Reagan-National flights
Miami to Reagan-National flights
San Diego to Dulles Intl flights
San Diego to Reagan-National flights
Charlotte to Dulles Intl flights
Salt Lake City to Dulles Intl 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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$204FlexibilityNo cancel feeOn-time62%
DeltaCheapest$99Average$344FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$107Average$237FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$149Average$390FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$163Average$433FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$189Average$363FlexibilityNo cancel feeOn-time63%

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