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Washington, D.C.

$71+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — WAS
sep. 8 — sep. 151
lun. 9/8
lun. 9/15
1 adult, Economy
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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 septiembre 3, 2025.

Round-trip from

$143
(Priceline)

One-way from

$71
(Cheapflightsfares)

Popular in

March

Cheapest in

August

Average price

$354

Good round-trip deal

$252 or less

Good one-way deal

$137 or less
From Missouri to Washington, D.C. (WAS)
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One-way flight from Missouri to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 5% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Missouri to Washington, D.C. (WAS).
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Price to beat on a one-way flight from Missouri to Washington, D.C. (WAS).
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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 septiembre 3, 2025.

This Priceline deal was found by Cheapflights users on 9/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/210:49 amSTL - BWI
1 stop6h 04mFrontier
dom. 10/56:22 amBWI - STL
1 stop9h 42mFrontier
Deal found 9/1$143
This Frontier deal was found by Cheapflights users on 9/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1110:49 amSTL - BWI
1 stop6h 04mFrontier
dom. 9/146:22 amBWI - STL
1 stop9h 42mFrontier
Deal found 9/1$144
This Kiwi.com deal was found by Cheapflights users on 8/31. 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.
jue. 9/1110:49 amSTL - BWI
1 stop6h 04mFrontier
vie. 9/126:27 pmBWI - STL
1 stop15h 39mFrontier
Deal found 8/31$149
This Cheapflightsfares deal was found by Cheapflights users on 9/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/25:15 pmMCI - BWI
1 stop6h 02mFrontier
jue. 10/96:05 amBWI - MCI
1 stop5h 37mFrontier
Deal found 9/3$150
This Frontier deal was found by Cheapflights users on 9/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/25:15 pmMCI - BWI
1 stop6h 02mFrontier
lun. 10/66:22 amBWI - MCI
1 stop10h 58mFrontier
Deal found 9/2$153
This Gotogate deal was found by Cheapflights users on 9/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/206:05 pmSTL - BWI
1 stop15h 15mFrontier
jue. 10/236:05 amBWI - STL
1 stop5h 32mFrontier
Deal found 9/2$154
This Frontier deal was found by Cheapflights users on 9/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/255:15 pmMCI - BWI
1 stop6h 02mFrontier
lun. 9/296:22 amBWI - MCI
1 stop10h 58mFrontier
Deal found 9/2$154
This Kiwi.com deal was found by Cheapflights users on 9/1. 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.
vie. 10/39:32 pmSTL - BWI
1 stop16h 45mFrontier
lun. 10/66:22 amBWI - STL
1 stop9h 42mFrontier
Deal found 9/1$155
This Booking.com deal was found by Cheapflights users on 9/3. 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.
vie. 9/191:57 pmSTL - BWI
1 stop24h 32mFrontier
dom. 9/216:22 amBWI - STL
1 stop9h 42mFrontier
Deal found 9/3$156
This Booking.com deal was found by Cheapflights users on 9/3. 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.
vie. 9/265:15 pmMCI - BWI
1 stop6h 02mFrontier
mié. 10/86:45 pmBWI - MCI
1 stop16h 57mFrontier
Deal found 9/3$162
This Kiwi.com deal was found by Cheapflights users on 9/2. 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.
lun. 10/69:32 pmSTL - BWI
1 stop11h 48mFrontier
vie. 10/106:09 pmBWI - STL
1 stop24h 53mFrontier
Deal found 9/2$163
This Booking.com deal was found by Cheapflights users on 9/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/911:37 amMCI - BWI
1 stop11h 36mFrontier
sáb. 10/114:37 pmBWI - MCI
1 stop19h 05mFrontier
Deal found 9/2$164

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 septiembre 3, 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

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

jue. 10/2

10:49 am-5:53 pm

1 stop6h 04m

Baltimore/Washington

lun. 10/6

6:22 am-3:04 pm

1 stop9h 42m

$143

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

lun. 9/15

4:00 pm-12:17 am

1 stop7h 17m

Baltimore/Washington

jue. 9/18

6:22 am-3:04 pm

1 stop9h 42m

$143

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

jue. 9/18

10:49 am-5:53 pm

1 stop6h 04m

Baltimore/Washington

lun. 9/22

6:22 am-3:04 pm

1 stop9h 42m

$143

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

jue. 10/2

4:00 pm-12:17 am

1 stop7h 17m

Baltimore/Washington

dom. 10/5

6:22 am-3:04 pm

1 stop9h 42m

$143

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

jue. 9/18

4:00 pm-12:17 am

1 stop7h 17m

Baltimore/Washington

dom. 9/21

6:22 am-3:04 pm

1 stop9h 42m

$143

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

lun. 9/15

4:00 pm-12:17 am

1 stop7h 17m

Baltimore/Washington

sáb. 10/18

11:33 am-6:02 pm

1 stop7h 29m

$144

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

lun. 9/15

4:00 pm-12:17 am

1 stop7h 17m

Baltimore/Washington

dom. 10/12

6:05 am-10:37 am

1 stop5h 32m

$144

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

jue. 9/25

4:00 pm-12:17 am

1 stop7h 17m

Baltimore/Washington

lun. 9/29

6:22 am-3:04 pm

1 stop9h 42m

$144

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

jue. 10/2

5:15 pm-12:17 am

1 stop6h 02m

Baltimore/Washington

jue. 10/9

6:05 am-10:42 am

1 stop5h 37m

$150

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

jue. 10/2

5:15 pm-12:17 am

1 stop6h 02m

Baltimore/Washington

lun. 10/6

6:22 am-4:20 pm

1 stop10h 58m

$153

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

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, August is the cheapest month in which you can book a flight from Missouri to Washington, D.C. (average of $241). Flying from Missouri to Washington, D.C. in March is currently the most expensive (average of $290). 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 septiembre 3, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Washington, D.C. as you normally would.

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 septiembre 3, 2025.

The most flights from USMO to WAS are scheduled on a Monday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 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 popular is this Missouri to Washington, D.C. flight route?

    This flight path from Missouri to Washington, D.C. was viewed by 26 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Missouri to Washington, D.C.?

    Airlines like Frontier, American Airlines, 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 3h 25m. Airlines will cover a distance of 947 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 Kansas City - Washington, D.C. Dulles Intl as they are the most popular.

  • What are the cheapest flights from Missouri to Washington, D.C.?

    While on average a flight from Missouri to Washington, D.C. is generally $372, our data shows the cheapest flight currently is $99. When looking at the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl), you can expect to pay $198 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 $241). Flying from Missouri to Washington, D.C. in March is currently the most expensive (average of $290). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Towson
Falls Church
Manassas
Rockville
Oxon Hill
Laurel
Dundalk
National Harbor
Waldorf
Hanover

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
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Fort Lauderdale to Dulles Intl flights
Austin to Dulles Intl flights
Miami to Dulles Intl flights
Orlando to Reagan-National flights
Austin to Reagan-National flights
Nashville to Reagan-National flights
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Salt Lake City to Dulles Intl flights
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Indianapolis to Dulles Intl flights
San Diego to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Portland to Dulles Intl flights
Portland to Reagan-National flights
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Cincinnati 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 septiembre 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$201FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$129Average$396FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$138Average$308FlexibilityNo cancel feeOn-time65%
DeltaCheapest$168Average$311FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$193Average$357FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$211Average$429FlexibilityNo cancel feeOn-time69%

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