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$72+ Cheap flights from Washington, D.C. (WAS) to Missouri

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 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — MCI
Jul 23 — Jul 301
Thu 7/23
Thu 7/30
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Missouri

Cheapest flights from Washington, D.C. to Missouri
Explore the most affordable flight options available from Washington, D.C. to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/88:25 am
BWI
-
MCI
1 stop9h 45m
Frontier
Mon 8/106:07 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Deal found 6/23$139
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/218:36 am
BWI
-
STL
1 stop10h 01m
Frontier
Tue 7/286:34 pm
STL
-
BWI
1 stop11h 52m
Frontier
Deal found 6/22$143
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/186:35 am
BWI
-
MCI
1 stop11h 35m
Frontier
Mon 7/206:07 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Deal found 6/21$144
This Kiwi.com deal was found by Cheapflights users on 6/20. 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.
Wed 7/159:37 pm
BWI
-
STL
1 stop21h 00m
Frontier
Wed 7/224:57 pm
STL
-
BWI
1 stop5h 20m
Frontier
Deal found 6/20$144
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/289:37 pm
BWI
-
STL
1 stop12h 20m
Frontier
Fri 7/314:57 pm
STL
-
BWI
1 stop13h 29m
Frontier
Deal found 6/22$145
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/159:37 pm
BWI
-
STL
1 stop21h 00m
Frontier
Mon 8/174:57 pm
STL
-
BWI
1 stop18h 27m
Frontier
Deal found 6/23$146
This Kiwi.com deal was found by Cheapflights users on 6/20. 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.
Sat 7/256:35 am
BWI
-
MCI
1 stop11h 35m
Frontier
Mon 8/36:07 pm
MCI
-
BWI
1 stop20h 27m
Frontier
Deal found 6/20$147
This Kiwi.com deal was found by Cheapflights users on 6/20. 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.
Wed 7/229:37 pm
BWI
-
STL
1 stop21h 00m
Frontier
Tue 8/46:34 pm
STL
-
BWI
1 stop11h 52m
Frontier
Deal found 6/20$147
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 8/69:37 pm
BWI
-
MCI
1 stop20h 33m
Frontier
Mon 8/106:07 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Deal found 6/22$152
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 10/89:29 pm
BWI
-
STL
1 stop13h 11m
Frontier
Mon 10/1210:35 am
STL
-
BWI
1 stop21h 22m
Frontier
Deal found 6/22$156
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 8/58:25 am
BWI
-
MCI
1 stop9h 45m
Frontier
Fri 8/76:07 pm
MCI
-
BWI
1 stop12h 19m
Frontier
Deal found 6/18$158
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 7/148:36 am
BWI
-
STL
1 stop10h 01m
Frontier
Fri 7/174:57 pm
STL
-
BWI
1 stop21h 37m
Frontier
Deal found 6/18$158

Find flight deals from Washington, D.C. to Missouri

Keep the following information in mind while searching for Washington, D.C. to Missouri flight deals. Data was last updated June 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$143
(Kiwi.com)

One-way from

$72
(Trip.com)

Popular in

March

Cheapest in

October

Average price

$362

Good round-trip deal

$306 or less

Good one-way deal

$176 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Lambert-St Louis flights.
Search Deals
From Washington, D.C. (WAS) to Missouri
Search Deals
One-way flight from Washington, D.C. (WAS) to Missouri
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to Missouri.
Search Deals
Price to beat on a one-way flight from Washington, D.C. (WAS) to Missouri.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Missouri 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 June 23, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Tue 8/4

11:40 am-5:55 pm

2 stops7h 15m

Lambert-St Louis

Wed 8/5

8:25 am-2:15 pm

1 stop4h 50m

$277

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 10/8

6:00 am-12:30 pm

1 stop7h 30m

Lambert-St Louis

Mon 10/12

3:00 pm-10:50 pm

1 stop6h 50m

$279

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Mon 9/21

6:50 pm-8:00 pm

Nonstop2h 10m

Lambert-St Louis

Thu 9/24

10:10 am-6:00 pm

2 stops6h 50m

$282

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Thu 8/6

6:00 am-9:54 am

1 stop4h 54m

Lambert-St Louis

Mon 8/10

12:52 pm-8:55 pm

1 stop7h 03m

$287

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 7/23

11:00 am-3:43 pm

1 stop5h 43m

Lambert-St Louis

Mon 7/27

1:22 pm-8:47 pm

1 stop6h 25m

$287
Quickest round-trip

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Wed 8/12

8:00 am-9:10 am

Nonstop2h 10m

Lambert-St Louis

Fri 8/14

8:10 am-11:10 am

Nonstop2h 00m

$287

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sat 7/11

3:50 pm-11:30 pm

2 stops8h 40m

Lambert-St Louis

Mon 7/13

5:35 pm-11:20 pm

1 stop4h 45m

$292

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 8/15

8:25 am-9:39 am

Nonstop2h 14m

Lambert-St Louis

Mon 8/17

6:54 pm-12:44 am

1 stop4h 50m

$293

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Tue 7/28

11:45 am-2:50 pm

1 stop4h 05m

Lambert-St Louis

Fri 7/31

7:55 pm-10:55 pm

Nonstop2h 00m

$293

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Wed 7/29

11:45 am-2:50 pm

1 stop4h 05m

Lambert-St Louis

Fri 7/31

3:30 pm-6:30 pm

Nonstop2h 00m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/21

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington, D.C. to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Washington, D.C. 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 Washington, D.C. to Missouri

What is the cheapest month to book a flight from Washington, D.C. to Missouri?

Currently, December is the cheapest month in which you can book a flight from Washington, D.C. to Missouri (average of $78). Flying from Washington, D.C. to Missouri in April is currently the most expensive (average of $1,010). 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 WAS to MO?

Find hourly flight availability from Washington, D.C. to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 23, 2026.

It’s typically best to fly out from Washington, D.C. to Missouri at noon. Doing so could potentially save you 5% on the flight price compared to flying in the afternoon, which is usually more expensive.

Weekly flight availability from Washington, D.C. to Missouri

Explore weekly flight availability from Washington, D.C. to Missouri. 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 June 23, 2026.

The most flights from WAS to USMO 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 (6 on average).

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

How far ahead should I book a flight from Washington, D.C. to Missouri?

The best time to book flights from Washington, D.C. to Missouri is 81 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 Washington, D.C. to Missouri?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Missouri. Price data was last updated on June 20, 2026.

Travelers seeking maximum savings on their Washington, D.C. to Missouri flight should consider departing on Sunday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Missouri. Reviews last updated June 23, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Washington, D.C. to Missouri. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
Southwest
7.9
Good
4,242 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
Delta
7.8
Good
8,424 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
United Airlines
7.4
Good
9,875 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
American Airlines
7.1
Good
11,745 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
Frontier
5.6
Fair
2,870 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Missouri. 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 Washington, D.C. to Missouri?

    Departing from Washington, D.C. to Missouri will take you 4h 54m. Airlines will cover a distance of 694 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Washington, D.C. to Missouri one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. to Missouri are Frontier ($60), American Airlines ($98), and Southwest ($98).

  • What are the most popular routes from Washington, D.C. to Missouri?

    The most popular flight routes from Washington, D.C. to Missouri are Washington, D.C. Dulles Intl - Kansas City, Washington, D.C. Reagan-National - Kansas City and Baltimore/Washington - Kansas City.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. to Missouri consider choosing Mesa Airlines (85%), United Airlines (84%) or Avianca (81%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $205. While the most popular route (Washington, D.C. Dulles Intl - Kansas City) can be booked for $223 on average, our data indicates $363 when flying from Washington, D.C. to Missouri.

  • Can I find deals for flights from Washington, D.C. to Missouri that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Missouri flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Missouri?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Missouri.

  • Can I find deals for business class flights from Washington, D.C. to Missouri?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Missouri 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 Washington, D.C. to Missouri?

    Currently, December is the cheapest month in which you can book a flight from Washington, D.C. to Missouri (average of $78). Flying from Washington, D.C. to Missouri in April is currently the most expensive (average of $1,010). 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

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Alternative routes for Washington, D.C. to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
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Reagan-National to Seattle flights
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Reagan-National to Midway flights
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Top 5 airlines flying from Washington, D.C. to Missouri

Discover the top 5 airlines that operate flights from Washington, D.C. to Missouri. 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 June 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$198FlexibilityNo cancel feeOn-time62%
DeltaCheapest$125Average$377FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$178Average$392FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$201Average$407FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$248Average$449FlexibilityNo cancel feeOn-time69%

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