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$70+ Cheap flights from Reagan-National (DCA) 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — STL
May 1 — May 81
Fri 5/1
Fri 5/8
1 adult, Economy
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Cheap flight deals from Reagan-National to Missouri

Cheapest flights from Reagan-National to Missouri
Explore the most affordable flight options available from Reagan-National to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2026.

This Southwest deal was found by Cheapflights users on 3/27. 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.
Mon 5/42:00 pm
DCA
-
STL
1 stop5h 55m
Southwest
Thu 5/77:40 pm
STL
-
DCA
Nonstop2h 00m
Southwest
Deal found 3/27$275
This Southwest deal was found by Cheapflights users on 3/30. 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.
Mon 6/1512:00 pm
DCA
-
STL
Nonstop2h 15m
Southwest
Wed 6/177:55 pm
STL
-
DCA
Nonstop2h 00m
Southwest
Deal found 3/30$276
This American Airlines deal was found by Cheapflights users on 4/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/271:46 pm
DCA
-
STL
Nonstop2h 27m
American Airlines
Thu 4/306:00 am
STL
-
DCA
Nonstop2h 15m
American Airlines
Deal found 4/1$279
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:00 pm
DCA
-
STL
1 stop26h 23m
Frontier
Sun 5/318:08 pm
STL
-
DCA
1 stop24h 50m
Frontier
Deal found 3/31$280
This CheapOair deal was found by Cheapflights users on 3/28. 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 5/76:00 pm
DCA
-
MCI
1 stop20h 49m
Frontier
Sun 5/102:34 pm
MCI
-
DCA
1 stop6h 24m
Frontier
Deal found 3/28$281
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/147:00 am
DCA
-
STL
1 stop13h 23m
Frontier
Mon 6/158:08 pm
STL
-
DCA
1 stop24h 51m
Frontier
Deal found 3/31$281
This CheapOair deal was found by Cheapflights users on 4/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/37:00 am
DCA
-
STL
1 stop27h 48m
Frontier
Wed 4/88:16 pm
STL
-
DCA
1 stop19h 43m
Frontier
Deal found 4/1$282
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Sat 4/257:59 am
DCA
-
STL
1 stop12h 33m
Frontier
Mon 4/279:55 pm
STL
-
DCA
2 stops14h 04m
Frontier
Deal found 3/31$283
This Delta deal was found by Cheapflights users on 4/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:38 pm
DCA
-
STL
1 stop4h 58m
Delta
Thu 4/3012:45 pm
STL
-
DCA
1 stop5h 07m
Delta
Deal found 4/1$285
This Southwest deal was found by Cheapflights users on 3/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/303:35 pm
DCA
-
STL
1 stop4h 05m
Southwest
Mon 5/410:15 am
STL
-
DCA
2 stops6h 50m
Southwest
Deal found 3/31$286
This American Airlines deal was found by Cheapflights users on 3/30. 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 4/218:31 am
DCA
-
MCI
Nonstop3h 02m
American Airlines
Wed 4/226:00 am
MCI
-
DCA
Nonstop2h 30m
American Airlines
Deal found 3/30$287
This Southwest deal was found by Cheapflights users on 3/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:50 pm
DCA
-
STL
Nonstop2h 25m
Southwest
Fri 5/81:20 pm
STL
-
DCA
Nonstop2h 00m
Southwest
Deal found 3/31$287

Find flight deals from Reagan-National to Missouri

Keep the following information in mind while searching for Reagan-National to Missouri flight deals. Data was last updated April 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$275
(Southwest)

One-way from

$70
(Priceline)

Popular in

March

Cheapest in

August

Average price

$327

Good round-trip deal

$312 or less

Good one-way deal

$168 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. Reagan-National to Missouri
Search Deals
One-way flight from Washington, D.C. Reagan-National 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 April 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Missouri.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Reagan-National to Missouri.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National 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 April 1, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport 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

Sat 4/18

4:55 pm-10:25 pm

1 stop6h 30m

Lambert-St Louis

Mon 4/20

7:40 pm-10:40 pm

Nonstop2h 00m

$275

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Wed 5/20

12:00 pm-1:25 pm

Nonstop2h 25m

Lambert-St Louis

Sat 5/23

2:25 pm-8:55 pm

1 stop5h 30m

$275

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Sat 5/2

8:00 am-4:25 pm

2 stops9h 25m

Lambert-St Louis

Wed 5/6

4:35 pm-11:25 pm

1 stop5h 50m

$276

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Wed 5/13

12:00 pm-1:25 pm

Nonstop2h 25m

Lambert-St Louis

Fri 5/15

7:40 pm-10:40 pm

Nonstop2h 00m

$287

Washington, D.C.Kansas City

DCA - MCI

DCAMCI

Washington, D.C. Reagan-National

Sat 5/23

6:15 pm-11:59 pm

1 stop6h 44m

Kansas City

Tue 5/26

10:45 am-6:59 pm

1 stop7h 14m

$294

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Thu 5/14

6:55 am-1:45 pm

1 stop7h 50m

Lambert-St Louis

Thu 5/21

7:40 pm-10:40 pm

Nonstop2h 00m

$300
Quickest round-trip

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Fri 5/29

2:45 pm-4:05 pm

Nonstop2h 20m

Lambert-St Louis

Mon 6/1

3:45 pm-6:45 pm

Nonstop2h 00m

$301

Washington, D.C.Columbia

DCA - COU

DCACOU

Washington, D.C. Reagan-National

Thu 5/7

5:55 am-9:46 am

1 stop4h 51m

Columbia Regional

Sat 5/9

4:28 pm-11:57 pm

1 stop6h 29m

$318

Washington, D.C.Columbia

DCA - COU

DCACOU

Washington, D.C. Reagan-National

Wed 4/15

10:30 am-2:48 pm

1 stop5h 18m

Columbia Regional

Mon 4/20

3:23 pm-9:06 pm

1 stop4h 43m

$323

Washington, D.C.Columbia

DCA - COU

DCACOU

Washington, D.C. Reagan-National

Wed 4/15

5:55 am-9:46 am

1 stop4h 51m

Columbia Regional

Mon 4/20

4:28 pm-11:57 pm

1 stop6h 29m

$323

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 56 resultsSorted by cheapest first
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Best time to book a flight from Reagan-National to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Reagan-National 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. Reagan-National Airport to Missouri

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Missouri (average of $154). Flying from Washington, D.C. Reagan-National Airport to Missouri in March is currently the most expensive (average of $276). 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 DCA to MO?

Find hourly flight availability from Reagan-National 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 April 1, 2026.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Reagan-National Airport to Missouri in the evening. If you’re flexible enough to do this you can expect to save up to 5% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to Missouri?

Use this chart to determine the cheapest time to fly round-trip from Reagan-National to Missouri. Price data was last updated on March 28, 2026.

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

How much does it cost to fly round-trip from Washington, D.C. Reagan-National Airport 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 April 1, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Reagan-National Airport to Missouri, such as Southwest,Delta, andUnited Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

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
4,335 reviews
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

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
8,368 reviews
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

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
9,529 reviews
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

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
11,544 reviews
Southwest
8.0
Very good
4,335 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

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 Reagan-National 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. Reagan-National Airport to Missouri?

    Southwest, Delta, and United Airlines can get you from Washington, D.C. Reagan-National Airport to Missouri in just under 5h 18m. Your travel time can differ by up to 1h 26m. Airlines will cover a distance of 816 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. Reagan-National Airport to Missouri one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. Reagan-National Airport to Missouri are Frontier ($64), Southwest ($95), and Delta ($108).

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

    The most popular route from Washington, D.C. Reagan-National Airport to Missouri is Washington, D.C. Reagan-National - Kansas City. You may also consider Washington, D.C. Reagan-National - Lambert-St Louis or Washington, D.C. Reagan-National - Springfield-Branson.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Reagan-National Airport to Missouri on time: Southwest (74%), Republic Airways (73%), American Airlines (66%).

  • What are the cheapest flights from Washington, D.C. Reagan-National Airport to Missouri?

    Looking at all options, your cheapest flight can be booked for $118. While the most popular route (Washington, D.C. Reagan-National - Kansas City) can be booked for $229 on average, our data indicates $323 when flying from Washington, D.C. Reagan-National Airport to Missouri.

  • Can I find deals for flights from Reagan-National to Missouri that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Missouri flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Missouri?

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

  • Can I find deals for business class flights from Reagan-National to Missouri?

    Yes. Cheapflights offers flight deals from Reagan-National 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. Reagan-National Airport to Missouri?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Missouri (average of $154). Flying from Washington, D.C. Reagan-National Airport to Missouri in March is currently the most expensive (average of $276). 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 Reagan-National to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Reagan-National to Missouri

Discover the top 4 airlines that operate flights from Reagan-National 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 April 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$167Average$372FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$188Average$363FlexibilityNo cancel feeOn-time63%
DeltaCheapest$248Average$433FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$493FlexibilityNo cancel feeOn-time69%

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