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Cheap flights from Missouri to Washington, D.C. from $113

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Washington, D.C. departing on 10/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Missouri to Washington, D.C.

Cheap round-trip flights

Frontier Logo
8:40 pm - 9:59 pmSTL-DCA
24h 19m1 stop
Frontier Logo
1:00 pm - 9:07 amDCA-STL
21h 07m1 stop
$187Frontier
Find Deal
Fri, Oct 31 - Mon, Nov 3
Frontier Logo
7:55 pm - 12:10 pmSTL-DCA
15h 15m1 stop
Frontier Logo
7:00 am - 9:06 amDCA-STL
27h 06m1 stop
$189Frontier
Find Deal
Tue, Sep 23 - Sat, Sep 27
Southwest Logo
8:15 am - 11:15 amSTL-DCA
2h 00mnonstop
Southwest Logo
2:50 pm - 4:00 pmDCA-STL
2h 10mnonstop
$231Southwest
Find Deal
Tue, Sep 30 - Wed, Oct 1
American Airlines Logo
5:49 am - 9:28 amMCI-DCA
2h 39mnonstop
American Airlines Logo
9:00 pm - 10:51 pmDCA-MCI
2h 51mnonstop
$237American Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 7
United Airlines Logo
8:00 am - 2:10 pmCOU-DCA
5h 10m1 stop
United Airlines Logo
5:00 pm - 9:19 pmDCA-COU
5h 19m1 stop
$238United Airlines
Find Deal
Wed, Nov 5 - Sat, Nov 8
American Airlines Logo
1:21 pm - 4:29 pmSTL-DCA
2h 08mnonstop
American Airlines Logo
12:31 pm - 4:04 pmDCA-STL
4h 33m1 stop
$241American Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 7
United Airlines Logo
3:23 pm - 9:03 pmSTL-DCA
4h 40m1 stop
United Airlines Logo
7:00 am - 10:48 amDCA-STL
4h 48m1 stop
$246United Airlines
Find Deal
Tue, Sep 30 - Wed, Oct 1
Southwest Logo
7:20 pm - 10:25 pmSTL-DCA
2h 05mnonstop
Southwest Logo
6:10 am - 11:05 amDCA-STL
5h 55m1 stop
$249Southwest
Find Deal
Tue, Sep 23 - Thu, Sep 25
Delta Logo
11:04 am - 5:20 pmSTL-DCA
5h 16m1 stop
Delta Logo
12:31 pm - 3:55 pmDCA-STL
4h 24m1 stop
$251Delta
Find Deal
Tue, Sep 30 - Wed, Oct 8
Delta Logo
6:30 am - 1:42 pmMCI-DCA
6h 12m1 stop
Delta Logo
5:00 pm - 9:03 pmDCA-MCI
5h 03m1 stop
$257Delta
Find Deal
Tue, Sep 30 - Tue, Oct 7

United Airlines flights from Missouri to Washington, D.C. Reagan-National Airport

Our best United Airlines deals on Missouri to Washington, D.C. Reagan-National Airport flight tickets
United Airlines
Nov 5
COU8:00 amColumbia Regional
5h 10m
1 stop
DCA2:10 pmWashington, D.C. Reagan-National
Nov 8
DCA5:00 pmWashington, D.C. Reagan-National
5h 19m
1 stop
COU9:19 pmColumbia Regional
$238
Find similar
United Airlines
Sep 30
STL3:23 pmLambert-St Louis
4h 40m
1 stop
DCA9:03 pmWashington, D.C. Reagan-National
Oct 1
DCA7:00 amWashington, D.C. Reagan-National
4h 48m
1 stop
STL10:48 amLambert-St Louis
$246
Find similar
United Airlines
Jan 21
MCI8:00 amKansas City
6h 32m
1 stop
DCA3:32 pmWashington, D.C. Reagan-National
Jan 25
DCA6:00 pmWashington, D.C. Reagan-National
4h 59m
1 stop
MCI9:59 pmKansas City
$278
Find similar

Southwest flights from Missouri to Washington, D.C. Reagan-National Airport

Our best Southwest deals on Missouri to Washington, D.C. Reagan-National Airport flight tickets
Southwest
Sep 30
STL8:15 amLambert-St Louis
2h 00m
DCA11:15 amWashington, D.C. Reagan-National
Oct 1
DCA2:50 pmWashington, D.C. Reagan-National
2h 10m
STL4:00 pmLambert-St Louis
$231
Find similar
Southwest
Sep 23
STL7:20 pmLambert-St Louis
2h 05m
DCA10:25 pmWashington, D.C. Reagan-National
Sep 25
DCA6:10 amWashington, D.C. Reagan-National
5h 55m
1 stop
STL11:05 amLambert-St Louis
$249
Find similar
Southwest
Sep 30
MCI7:35 amKansas City
2h 25m
DCA11:00 amWashington, D.C. Reagan-National
Oct 7
DCA3:45 pmWashington, D.C. Reagan-National
7h 05m
2 stops
MCI9:50 pmKansas City
$252
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Missouri to Washington, D.C. Reagan-National Airport 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, momondo users made 832,500 searches. Data last updated September 4, 2025.
Use the filters below to find and compare flights from Missouri to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 10/31

8:40 pm-9:59 pm

1 stop24h 19m

Washington, D.C. Reagan-National

Mon 11/3

1:00 pm-9:07 am

1 stop21h 07m

$187

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 9/23

7:55 pm-12:10 pm

1 stop15h 15m

Washington, D.C. Reagan-National

Sat 9/27

7:00 am-9:06 am

1 stop27h 06m

$189

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 9/30

8:15 am-11:15 am

Nonstop2h 00m

Washington, D.C. Reagan-National

Wed 10/1

2:50 pm-4:00 pm

Nonstop2h 10m

$231

Kansas CityWashington, D.C.

MCI - DCA

MCIDCA

Kansas City

Tue 9/30

5:49 am-9:28 am

Nonstop2h 39m

Washington, D.C. Reagan-National

Tue 10/7

9:00 pm-10:51 pm

Nonstop2h 51m

$237

ColumbiaWashington, D.C.

COU - DCA

COUDCA

Columbia Regional

Wed 11/5

8:00 am-2:10 pm

1 stop5h 10m

Washington, D.C. Reagan-National

Sat 11/8

5:00 pm-9:19 pm

1 stop5h 19m

$238

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 9/30

1:21 pm-4:29 pm

Nonstop2h 08m

Washington, D.C. Reagan-National

Tue 10/7

12:31 pm-4:04 pm

1 stop4h 33m

$241

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 9/30

3:23 pm-9:03 pm

1 stop4h 40m

Washington, D.C. Reagan-National

Wed 10/1

7:00 am-10:48 am

1 stop4h 48m

$246

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 9/23

7:20 pm-10:25 pm

Nonstop2h 05m

Washington, D.C. Reagan-National

Thu 9/25

6:10 am-11:05 am

1 stop5h 55m

$249

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Tue 9/30

11:04 am-5:20 pm

1 stop5h 16m

Washington, D.C. Reagan-National

Wed 10/8

12:31 pm-3:55 pm

1 stop4h 24m

$251

Kansas CityWashington, D.C.

MCI - DCA

MCIDCA

Kansas City

Tue 9/30

6:30 am-1:42 pm

1 stop6h 12m

Washington, D.C. Reagan-National

Tue 10/7

5:00 pm-9:03 pm

1 stop5h 03m

$257

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Missouri to Washington, D.C. Reagan-National Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

The month of August is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Missouri, with most prices found around $256. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $268.

What is the cheapest day to depart on your flight to Washington, D.C. Reagan-National Airport?

The cheapest day to depart from Missouri to Washington, D.C. Reagan-National Airport is on a Saturday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Saturday will often find tickets for as low as $293. Flights from Missouri to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $382. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Washington, D.C. Reagan-National Airport?

Our data shows that the cheapest Missouri to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the evening. Our users have found flights to Washington, D.C. Reagan-National Airport in the evening for as low as $287. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is in the morning when prices are around $338.

What is the cheapest Missouri to Washington, D.C. Reagan-National flight route?

Fly from Lambert-St Louis to Washington, D.C. Reagan-National for the best Missouri - Washington, D.C. Reagan-National flight prices

How far in advance should I book a flight to Washington, D.C. Reagan-National Airport?

You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from Missouri when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $285 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from Missouri for as low as $216 on momondo.

What cabin class options are available on Missouri to Washington, D.C. Reagan-National flights?

There are 3 cabin classes available to choose from on Missouri to Washington, D.C. Reagan-National flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Missouri to Washington, D.C. Reagan-National Airport flights?

No. A direct flight is the cheapest option for a flight between Missouri to Washington, D.C. Reagan-National Airport.

Cheap Missouri to Washington, D.C. Reagan-National Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Missouri to Washington, D.C. Reagan-National Airport

Best Price Found

$137

Fastest flight time

1h 55m

Direct flights

Every day
The best one-way flight to Washington, D.C. Reagan-National Airport from Missouri in the past 72 hours is $137. The best round-trip flight deal from Missouri to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $252.
The fastest flight from Missouri to Washington, D.C. Reagan-National Airport takes 1h 55m
Direct flights go from Missouri to Washington, D.C. Reagan-National Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Missouri to Washington, D.C. Reagan-National Airport?

    Prices for flights from Missouri to Washington, D.C. Reagan-National Airport were last updated today.

  • How many operators does momondo search for flights from Missouri to Washington, D.C. Reagan-National Airport?

  • How old do you have to be to fly from Missouri to Washington, D.C. Reagan-National Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Missouri to Washington, D.C. Reagan-National Airport?

Best airlines flying from Missouri to Washington, D.C. Reagan-National Airport

Compare and see reviews for airlines that fly from Missouri to Washington, D.C. Reagan-National Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $111Free CancellationRating
5.8
3,194 reviews
Search Frontier flights
American AirlinesPriceFrom $130Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $193Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
United AirlinesPriceFrom $211Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
DeltaPriceFrom $248Free CancellationRating
7.9
7,977 reviews
Search Delta flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Gettysburg
National Harbor
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Silver Spring
Colonial Beach
Fredericksburg
Towson
Rockville
Manassas
Reston
Fairfax
Gaithersburg
Glen Burnie
Springfield
Linthicum Heights

Why use momondo?

Why should I use momondo to find a flight deal from Missouri to Washington, D.C.?

It is quick and easy to find Missouri to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from Missouri to Washington, D.C. with flexible booking policies on momondo?

Yes. All flights to Washington, D.C. from Missouri on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Missouri to Washington, D.C.?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from Missouri.

I’m not ready to book a flight from Missouri to Washington, D.C. right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Missouri to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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