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$70+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — STL
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
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 March 23, 2026.

This Frontier deal was found by Cheapflights users on 3/19. 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 4/101:04 pm
BWI
-
STL
1 stop11h 54m
Frontier
Wed 4/158:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Deal found 3/19$140
This CheapOair deal was found by Cheapflights users on 3/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1212:08 pm
BWI
-
STL
1 stop20h 43m
Frontier
Wed 4/158:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Deal found 3/21$151
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/225:49 pm
BWI
-
STL
1 stop17h 41m
Frontier
Tue 5/196:33 pm
STL
-
BWI
1 stop12h 10m
Frontier
Deal found 3/18$154
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 5/59:25 pm
BWI
-
STL
1 stop12h 30m
Frontier
Tue 5/126:33 pm
STL
-
BWI
1 stop12h 10m
Frontier
Deal found 3/19$157
This Expedia deal was found by Cheapflights users on 3/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/82:27 pm
BWI
-
STL
1 stop9h 58m
Frontier
Wed 4/158:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Deal found 3/21$160
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 4/215:49 pm
BWI
-
STL
1 stop14h 01m
Frontier
Wed 4/228:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Deal found 3/19$162
This Mytrip deal was found by Cheapflights users on 3/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/131:04 pm
BWI
-
STL
1 stop11h 21m
Frontier
Thu 4/1611:25 am
STL
-
BWI
1 stop4h 48m
Frontier
Deal found 3/20$166
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/225:49 pm
BWI
-
MCI
1 stop18h 09m
Frontier
Mon 4/2711:13 am
MCI
-
BWI
1 stop23h 09m
Frontier
Deal found 3/18$169
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 5/59:25 pm
BWI
-
STL
1 stop12h 30m
Frontier
Mon 5/115:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 3/19$169
This CheapOair deal was found by Cheapflights users on 3/19. 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 4/108:58 am
BWI
-
STL
1 stop16h 00m
Frontier
Fri 4/244:59 pm
STL
-
BWI
1 stop26h 52m
Frontier
Deal found 3/19$171
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 4/225:49 pm
BWI
-
STL
1 stop17h 41m
Frontier
Wed 5/135:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 3/19$174
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 5/89:25 pm
BWI
-
STL
1 stop12h 30m
Frontier
Mon 5/115:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 3/19$178

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 March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$140
(Frontier)

One-way from

$70
(Frontier)

Popular in

March

Cheapest in

August

Average price

$399

Good round-trip deal

$311 or less

Good one-way deal

$173 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. 8% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 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

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Mon 4/20

6:05 am-10:15 am

1 stop5h 10m

Lambert-St Louis

Sat 4/25

5:40 am-11:55 am

1 stop5h 15m

$276
Quickest round-trip

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Mon 4/20

2:45 pm-4:05 pm

Nonstop2h 20m

Lambert-St Louis

Sat 4/25

3:25 pm-6:25 pm

Nonstop2h 00m

$277

Washington, D.C.Kansas City

DCA - MCI

DCAMCI

Washington, D.C. Reagan-National

Thu 4/16

3:00 pm-4:55 pm

Nonstop2h 55m

Kansas City

Mon 4/20

6:35 pm-9:55 pm

Nonstop2h 20m

$287

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 6/11

8:00 am-9:10 am

Nonstop2h 10m

Lambert-St Louis

Mon 6/15

5:05 am-1:10 pm

1 stop7h 05m

$290

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sat 4/25

6:25 pm-7:50 pm

Nonstop2h 25m

Lambert-St Louis

Tue 4/28

8:05 am-11:05 am

Nonstop2h 00m

$295

Washington, D.C.Kansas City

DCA - MCI

DCAMCI

Washington, D.C. Reagan-National

Mon 6/1

6:10 am-7:55 am

Nonstop2h 45m

Kansas City

Thu 6/11

7:45 am-11:05 am

Nonstop2h 20m

$300

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Mon 4/20

8:00 am-9:20 am

Nonstop2h 20m

Lambert-St Louis

Fri 4/24

7:40 pm-10:40 pm

Nonstop2h 00m

$301

BaltimoreKansas City

BWI - MCI

BWIMCI

Baltimore/Washington

Thu 4/23

8:15 am-10:05 am

Nonstop2h 50m

Kansas City

Mon 4/27

12:05 pm-7:05 pm

1 stop6h 00m

$303

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sun 5/31

6:05 am-9:30 am

1 stop4h 25m

Lambert-St Louis

Wed 6/10

3:30 pm-10:40 pm

1 stop6h 10m

$307

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Mon 5/4

6:00 pm-8:55 pm

1 stop3h 55m

Lambert-St Louis

Thu 5/7

4:00 pm-7:05 pm

Nonstop2h 05m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

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, September is the cheapest month in which you can book a flight from Washington, D.C. to Missouri (average of $109). Flying from Washington, D.C. to Missouri in February 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 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 March 23, 2026.

It’s typically best to fly out from Washington, D.C. to Missouri in the evening. Doing so could potentially save you 10% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 March 23, 2026.

Travelers seeking maximum savings on their Washington, D.C. to Missouri flight should consider departing on Friday evenings 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.

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 March 23, 2026.

The most flights from WAS to USMO 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 (10 on average).

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

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 March 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
8.0
Very good
4,324 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,324 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,319 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,462 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,489 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,019 reviews
Southwest
8.0
Very good
4,324 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 36m. Airlines will cover a distance of 964 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), Southwest ($95), and Delta ($99).

  • 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 Washington, D.C. Reagan-National - Lambert-St Louis.

  • 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 Republic Airways (100%), United Airlines (84%) or Lufthansa (77%) 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 $127. While the most popular route (Washington, D.C. Dulles Intl - Lambert-St Louis) can be booked for $233 on average, our data indicates $630 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, September is the cheapest month in which you can book a flight from Washington, D.C. to Missouri (average of $109). Flying from Washington, D.C. to Missouri in February 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

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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.
Dulles Intl to Dallas/Fort Worth flights
Dulles Intl to Las Vegas flights
Dulles Intl to Orlando flights
Dulles Intl to Miami flights
Dulles Intl to Seattle flights
Reagan-National to Dallas/Fort Worth flights
Reagan-National to Miami flights
Dulles Intl to Los Angeles flights
Reagan-National to Seattle flights
Reagan-National to Los Angeles flights
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Dulles Intl to O'Hare Intl flights
Reagan-National to Las Vegas flights
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Dulles Intl to Denver flights
Dulles Intl to Fort Lauderdale flights
Reagan-National to O'Hare Intl flights
Dulles Intl to Tampa flights
Reagan-National to Atlanta flights
Reagan-National to Hobby flights
Dulles Intl to New Orleans flights
Reagan-National to Fort Lauderdale flights
Dulles Intl to Sky Harbor Intl flights
Dulles Intl to San Francisco flights
Dulles Intl to George Bush Intcntl flights
Reagan-National to San Francisco flights
Reagan-National to Boston flights
Dulles Intl to Boston flights
Reagan-National to Tampa flights
Reagan-National to George Bush Intcntl flights
Reagan-National to Denver flights
Reagan-National to Nashville flights
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Reagan-National to New Orleans flights
Reagan-National to Sky Harbor Intl flights
Dulles Intl to Nashville flights
Dulles Intl to San Diego flights
Reagan-National to Salt Lake City flights
Reagan-National to Minneapolis flights
Reagan-National to West Palm Beach flights
Reagan-National to Austin flights
Reagan-National to LaGuardia flights
Dulles Intl to Portland flights
Dulles Intl to Detroit flights
Dulles Intl to Minneapolis flights
Dulles Intl to Charleston flights
Reagan-National to Charleston flights

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 March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$200FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$111Average$231FlexibilityNo cancel feeOn-time65%
DeltaCheapest$124Average$352FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$167Average$386FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$188Average$382FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$239Average$442FlexibilityNo cancel feeOn-time69%

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