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Washington, D.C.

$52+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — WAS
Jan 4 — Jan 111
Sun 1/4
Sun 1/11
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 December 5, 2025.

This Booking.com deal was found by Cheapflights users on 12/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/163:30 pmSTL - BWI
1 stop17h 51mFrontier
Sat 1/108:09 pmBWI - STL
1 stop13h 31mFrontier
Deal found 12/4$174
This Booking.com deal was found by Cheapflights users on 12/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:27 pmSTL - BWI
1 stop13h 55mFrontier
Wed 1/78:00 amBWI - STL
1 stop15h 33mFrontier
Deal found 12/3$181
This Kiwi.com deal was found by Cheapflights users on 12/4. 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.
Thu 12/2510:42 amSTL - BWI
1 stop12h 52mFrontier
Thu 1/15:30 amBWI - STL
1 stop5h 10mFrontier
Deal found 12/4$191
This Mytrip deal was found by Cheapflights users on 12/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/224:27 pmSTL - BWI
1 stop13h 55mFrontier
Mon 12/2910:00 pmBWI - STL
1 stop25h 33mFrontier
Deal found 12/3$192
This CheapOair deal was found by Cheapflights users on 12/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/253:47 pmMCI - BWI
1 stop7h 02mSpirit Airlines
Thu 1/16:30 amBWI - MCI
1 stop11h 40mSpirit Airlines
Deal found 12/4$196
This Travelocity deal was found by Cheapflights users on 12/4. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2411:33 amMCI - BWI
1 stop11h 56mMultiple Airlines
Tue 12/3010:40 amBWI - MCI
1 stop13h 19mMultiple Airlines
Deal found 12/4$203
This Frontier deal was found by Cheapflights users on 12/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:04 pmSTL - BWI
1 stop11h 20mFrontier
Mon 12/155:40 amBWI - STL
1 stop5h 12mFrontier
Deal found 12/4$204
This Mytrip deal was found by Cheapflights users on 12/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:37 pmSTL - BWI
1 stop9h 45mFrontier
Mon 12/2210:00 pmBWI - STL
1 stop25h 33mFrontier
Deal found 12/2$206
This Priceline deal was found by Cheapflights users on 12/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:54 amSTL - BWI
1 stop9h 22mFrontier
Mon 12/155:40 amBWI - STL
1 stop5h 12mFrontier
Deal found 12/4$208
This Priceline deal was found by Cheapflights users on 12/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/183:47 pmMCI - BWI
1 stop7h 02mMultiple Airlines
Mon 1/55:30 amBWI - MCI
1 stop5h 38mMultiple Airlines
Deal found 12/3$212
This Priceline deal was found by Cheapflights users on 12/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:54 amSTL - IAD
1 stop9h 30mFrontier
Sun 12/145:45 amIAD - STL
1 stop5h 02mFrontier
Deal found 12/3$212
This Kiwi.com deal was found by Cheapflights users on 12/4. 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.
Sun 12/149:54 amSTL - IAD
2 stops28h 16mMultiple Airlines
Wed 12/317:01 pmIAD - STL
1 stop15h 39mMultiple Airlines
Deal found 12/4$213

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 December 5, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$128
(Frontier)

One-way from

$52
(Trip.com)

Popular in

March

Cheapest in

August

Average price

$334

Good round-trip deal

$304 or less

Good one-way deal

$169 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 ($32 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 December 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 December 5, 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 1/8

9:48 am-7:21 am

1 stop20h 33m

Baltimore/Washington

Sat 1/10

12:23 pm-8:47 am

1 stop21h 24m

$171

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Sun 1/25

5:42 pm-10:26 am

2 stops15h 44m

Baltimore/Washington

Fri 1/30

4:01 pm-11:33 pm

1 stop8h 32m

$184

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Wed 2/25

5:35 am-11:54 am

1 stop5h 19m

Baltimore/Washington

Wed 2/25

4:45 pm-11:54 pm

1 stop8h 09m

$197

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 1/8

3:43 pm-12:29 am

1 stop7h 46m

Baltimore/Washington

Sun 1/11

5:45 am-2:48 pm

1 stop10h 03m

$197

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Wed 2/25

7:35 am-12:40 pm

1 stop4h 05m

Baltimore/Washington

Wed 2/25

5:50 pm-9:25 pm

1 stop4h 35m

$205

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 1/29

5:42 pm-11:17 am

1 stop16h 35m

Baltimore/Washington

Sun 2/1

4:44 pm-6:51 am

2 stops15h 07m

$206

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sun 2/1

6:00 am-2:24 pm

1 stop7h 24m

Washington, D.C. Reagan-National

Wed 2/4

3:41 pm-5:23 pm

Nonstop2h 42m

$215

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 1/12

1:05 pm-4:00 pm

Nonstop1h 55m

Washington, D.C. Reagan-National

Thu 1/15

3:00 pm-8:10 pm

1 stop6h 10m

$218

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 2/12

8:30 am-1:00 pm

1 stop3h 30m

Washington, D.C. Reagan-National

Tue 2/17

8:00 am-9:35 am

Nonstop2h 35m

$220

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Fri 1/2

8:15 am-11:24 am

Nonstop2h 09m

Washington, D.C. Dulles Intl

Wed 1/7

5:50 pm-7:27 pm

Nonstop2h 37m

$225

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/5

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, November is the cheapest month in which you can book a flight from Missouri to Washington, D.C. (average of $87). 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 December 5, 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 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 December 5, 2025.

The most flights from USMO to WAS are scheduled on a Monday (14 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 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 Frontier, Delta, and Southwest fly from Missouri to Washington, D.C. in about 4h 05m. The time it takes to get you to your destination can typically vary by up to 16h 28m. Airlines will cover a distance of 964 mi. This flight may include one or multiple stops.

  • 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 Copa Airlines (80%), Avianca (78%) or GoJet (71%) 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 $675, our data shows the cheapest flight currently is $131. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl), you can expect to pay $150 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, November is the cheapest month in which you can book a flight from Missouri to Washington, D.C. (average of $87). 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
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Bowie
Largo
McLean
Clinton
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.
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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 December 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$106Average$197FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$107Average$308FlexibilityNo cancel feeOn-time65%
DeltaCheapest$124Average$336FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$151Average$408FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$197Average$360FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$212Average$440FlexibilityNo cancel feeOn-time69%

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