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$86+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — STL
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap 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 July 31, 2025.

Round-trip from

$161
(FlightHub)

One-way from

$91
(FlightHub)

Popular in

January

Cheapest in

August

Average price

$375

Good round-trip deal

$218 or less

Good one-way deal

$129 or less
From Washington, D.C. (WAS) to Missouri
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One-way flight from Washington, D.C. (WAS) to Missouri
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Highest demand for flights based on searches. 11% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Washington, D.C. (WAS) to Missouri.
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Price to beat on a one-way flight from Washington, D.C. (WAS) to Missouri.
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Find 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 July 31, 2025.

This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/202:30 pmBWI - STL
1 stop24h 02mSpirit Airlines
Sun 8/312:30 pmSTL - BWI
1 stop6h 39mSpirit Airlines
Deal found 7/29$161
This CheapOair deal was found by Cheapflights users on 7/29. 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.
Fri 8/226:10 amBWI - STL
1 stop7h 46mMultiple Airlines
Mon 8/252:30 pmSTL - BWI
1 stop6h 39mMultiple Airlines
Deal found 7/29$169
This CheapOair deal was found by Cheapflights users on 7/29. 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 9/41:17 pmBWI - MCI
1 stop10h 50mSpirit Airlines
Sat 9/65:15 amMCI - BWI
1 stop9h 17mSpirit Airlines
Deal found 7/29$187
This Frontier deal was found by Cheapflights users on 7/30. 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.
Tue 8/122:59 pmBWI - STL
1 stop9h 48mFrontier
Sat 8/162:52 pmSTL - BWI
1 stop8h 07mFrontier
Deal found 7/30$198
This Frontier deal was found by Cheapflights users on 7/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/161:37 pmIAD - STL
1 stop11h 10mFrontier
Mon 8/182:37 pmSTL - IAD
1 stop14h 57mFrontier
Deal found 7/31$208
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2610:15 amBWI - MCI
Nonstop2h 40mSouthwest
Tue 8/264:25 pmMCI - BWI
Nonstop2h 30mSouthwest
Deal found 7/30$217
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/278:40 amIAD - STL
Nonstop2h 22mUnited Airlines
Wed 9/38:15 amSTL - IAD
Nonstop2h 10mUnited Airlines
Deal found 7/30$217
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Tue 8/267:59 pmDCA - MCI
Nonstop2h 46mAmerican Airlines
Thu 8/284:10 pmMCI - DCA
Nonstop2h 34mAmerican Airlines
Deal found 7/30$217
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/192:35 pmBWI - STL
Nonstop2h 10mSouthwest
Wed 8/206:50 pmSTL - BWI
Nonstop2h 00mSouthwest
Deal found 7/29$217
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/221:00 pmIAD - MCI
Nonstop2h 48mUnited Airlines
Wed 9/35:47 pmMCI - IAD
Nonstop2h 36mUnited Airlines
Deal found 7/29$217
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 9/108:30 amDCA - STL
Nonstop2h 51mAmerican Airlines
Sat 9/137:01 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Deal found 7/30$217
This Frontier deal was found by Cheapflights users on 7/30. 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 8/226:10 amIAD - MCI
1 stop5h 17mFrontier
Mon 8/2511:22 amMCI - IAD
1 stop11h 54mFrontier
Deal found 7/30$218

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 July 31, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Missouri that are best for you.

Fly from

Washington, D.C.

Fly to

Missouri

Route

Depart

Return

Price

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 8/20

2:30 pm-1:32 pm

1 stop24h 02m

Lambert-St Louis

Sun 8/31

2:30 pm-10:09 pm

1 stop6h 39m

$161

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Fri 8/22

6:10 am-12:56 pm

1 stop7h 46m

Lambert-St Louis

Mon 8/25

2:30 pm-10:09 pm

1 stop6h 39m

$169

BaltimoreKansas City

BWI - MCI

BWIMCI

Baltimore/Washington

Thu 9/4

1:17 pm-11:07 pm

1 stop10h 50m

Kansas City

Sat 9/6

5:15 am-3:32 pm

1 stop9h 17m

$187

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 8/12

2:59 pm-11:47 pm

1 stop9h 48m

Lambert-St Louis

Sat 8/16

2:52 pm-11:59 pm

1 stop8h 07m

$198

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 8/16

1:37 pm-11:47 pm

1 stop11h 10m

Lambert-St Louis

Mon 8/18

2:37 pm-6:34 am

1 stop14h 57m

$208

BaltimoreKansas City

BWI - MCI

BWIMCI

Baltimore/Washington

Tue 8/26

10:15 am-11:55 am

Nonstop2h 40m

Kansas City

Tue 8/26

4:25 pm-7:55 pm

Nonstop2h 30m

$217

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 8/27

8:40 am-10:02 am

Nonstop2h 22m

Lambert-St Louis

Wed 9/3

8:15 am-11:25 am

Nonstop2h 10m

$217

Washington, D.C.Kansas City

DCA - MCI

DCAMCI

Washington, D.C. Reagan-National

Tue 8/26

7:59 pm-9:45 pm

Nonstop2h 46m

Kansas City

Thu 8/28

4:10 pm-7:44 pm

Nonstop2h 34m

$217

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 8/19

2:35 pm-3:45 pm

Nonstop2h 10m

Lambert-St Louis

Wed 8/20

6:50 pm-9:50 pm

Nonstop2h 00m

$217

Washington, D.C.Kansas City

IAD - MCI

IADMCI

Washington, D.C. Dulles Intl

Fri 8/22

1:00 pm-2:48 pm

Nonstop2h 48m

Kansas City

Wed 9/3

5:47 pm-9:23 pm

Nonstop2h 36m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 60 results
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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, August is the cheapest month in which you can book a flight from Washington, D.C. to Missouri (average of $311). Flying from Washington, D.C. to Missouri in March is currently the most expensive (average of $356). 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 July 31, 2025.

When flying from Washington, D.C. to Missouri, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 July 31, 2025.

The most flights from WAS to USMO are scheduled on a Monday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

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 July 31, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Washington, D.C. to Missouri. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 popular is this Washington, D.C. to Missouri flight route?

    This flight path from Washington, D.C. to Missouri was viewed by 20 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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 Spirit Airlines ($91), Frontier ($99), and Southwest ($109).

  • 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 - Lambert-St Louis, Washington, D.C. Dulles Intl - Kansas City and Baltimore/Washington - Lambert-St Louis.

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

    Looking at all options, your cheapest flight can be booked for $98. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $209 on average our data indicates $288 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, August is the cheapest month in which you can book a flight from Washington, D.C. to Missouri (average of $311). Flying from Washington, D.C. to Missouri in March is currently the most expensive (average of $356). 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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Top 6 airlines flying from Washington, D.C. to Missouri

Discover the top 6 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$109Average$225FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$123Average$253FlexibilityNo cancel feeOn-time65%
DeltaCheapest$141Average$353FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$158Average$398FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$189Average$366FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$198Average$441FlexibilityNo cancel feeOn-time69%

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