What is the cheapest airline that flies from Missouri to Washington, D.C. Reagan-National?

Frontier, Delta, and Southwest are the most popular carriers operating from Missouri to Washington, D.C. Reagan-National

How long does it take to fly to Washington, D.C. Reagan-National Airport?

Flight times from Missouri to Washington, D.C. Reagan-National Airport vary, but if you’re flying out of St. Louis and flying into Washington, D.C. Dulles Intl Airport (one of the most popular routes), then the duration is 2h 10m on average. Another popular route from Missouri to Washington, D.C. Reagan-National Airport is flying from Kansas City to Washington, D.C. Dulles Intl Airport, which will take roughly 2h 29m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Washington, D.C. Reagan-National Airport?

American Airlines, Southwest and United Airlines are the top three most popular airlines that fly to Washington, D.C. Reagan-National Airport from Missouri according to our data. American Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Washington, D.C. Reagan-National Airport. Keep in mind that there are 5 different airlines that fly to Washington, D.C. Reagan-National Airport on a routine basis, so you have a few additional options to choose from.

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

There are 5 operators available for flights from Missouri to Washington, D.C. Reagan-National Airport as of March 2026.

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.

$70 Cheap Flights from Missouri to Washington, D.C. Reagan-National Airport in 2026

Q: How many flights depart from Missouri to Washington, D.C. Reagan-National Airport on average per week?

As of March 2026, there are 69 flights per week flying from Missouri to Washington, D.C. Reagan-National Airport. The most common day of the week flights depart is Mon, with 20% of flights taking off on this day.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Missouri to Washington, D.C.

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:03 pm - 7:34 pm

STL

DCA

5h 31m

1 stop

6:00 am - 10:34 am

DCA

STL

5h 34m

1 stop

$242Delta

Wed, Apr 15 - Sat, Apr 18

12:05 pm - 3:05 pm

STL

DCA

2h 00mnonstop

8:00 am - 9:20 am

DCA

STL

2h 20mnonstop

$243Southwest

Sat, Apr 18 - Mon, Apr 20

3:45 pm - 6:45 pm

STL

DCA

2h 00mnonstop

8:00 am - 9:20 am

DCA

STL

2h 20mnonstop

$244Southwest

Thu, Apr 23 - Mon, Apr 27

8:06 pm - 1:00 pm

STL

DCA

15h 54m

1 stop

6:00 pm - 7:21 pm

DCA

STL

26h 21m

1 stop

$246Frontier

Fri, Apr 17 - Sat, Apr 18

5:15 am - 2:00 pm

STL

DCA

7h 45m

2 stops

10:55 am - 5:55 pm

DCA

STL

8h 00m

1 stop

$248Southwest

Sat, May 2 - Tue, May 5

6:00 am - 9:15 am

STL

DCA

2h 15mnonstop

7:59 pm - 9:25 pm

DCA

STL

2h 26mnonstop

$251American Airlines

Wed, Apr 15 - Sat, Apr 18

3:43 pm - 6:58 pm

STL

DCA

2h 15mnonstop

1:44 pm - 5:49 pm

DCA

STL

5h 05m

1 stop

$261American Airlines

Wed, Apr 15 - Sat, Apr 18

2:15 pm - 4:59 pm

MCI

DCA

25h 44m

1 stop

1:59 pm - 2:06 pm

DCA

MCI

25h 07m

1 stop

$291Frontier

Sun, Apr 26 - Fri, May 1

11:23 am - 5:04 pm

SGF

DCA

4h 41m

1 stop

8:20 am - 2:35 pm

DCA

SGF

7h 15m

1 stop

$339United Airlines

Wed, Apr 8 - Sat, Apr 11

8:00 am - 2:14 pm

COU

DCA

5h 14m

1 stop

6:30 am - 10:55 am

DCA

COU

5h 25m

1 stop

$344United Airlines

Sat, Apr 4 - Wed, Apr 8

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

Our best Frontier deals on Missouri to Washington, D.C. Reagan-National Airport flight tickets

Frontier

Apr 17

STL8:06 pmLambert-St Louis

15h 54m

1 stop

DCA1:00 pmWashington, D.C. Reagan-National

Apr 18

DCA6:00 pmWashington, D.C. Reagan-National

26h 21m

1 stop

STL7:21 pmLambert-St Louis

$246

Frontier

Mar 30

STL8:12 pmLambert-St Louis

14h 52m

1 stop

DCA12:04 pmWashington, D.C. Reagan-National

Apr 2

DCA7:00 amWashington, D.C. Reagan-National

27h 48m

1 stop

STL9:48 amLambert-St Louis

$247

Frontier

May 8

STL8:08 pmLambert-St Louis

15h 51m

1 stop

DCA12:59 pmWashington, D.C. Reagan-National

May 15

DCA6:00 pmWashington, D.C. Reagan-National

26h 23m

1 stop

STL7:23 pmLambert-St Louis

$267

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

Our best American Airlines deals on Missouri to Washington, D.C. Reagan-National Airport flight tickets

American Airlines

Apr 15

STL6:00 amLambert-St Louis

2h 15m

DCA9:15 amWashington, D.C. Reagan-National

Apr 18

DCA7:59 pmWashington, D.C. Reagan-National

2h 26m

STL9:25 pmLambert-St Louis

$251

American Airlines

Apr 15

STL6:55 pmLambert-St Louis

4h 04m

1 stop

DCA11:59 pmWashington, D.C. Reagan-National

Apr 18

DCA7:59 pmWashington, D.C. Reagan-National

2h 26m

STL9:25 pmLambert-St Louis

$261

American Airlines

May 18

STL6:00 amLambert-St Louis

2h 15m

DCA9:15 amWashington, D.C. Reagan-National

May 20

DCA8:12 amWashington, D.C. Reagan-National

2h 25m

STL9:37 amLambert-St Louis

$262

momondo Fare Finder

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

Cheapest round-trip

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Wed 4/15

1:03 pm-7:34 pm

1 stop5h 31m

Washington, D.C. Reagan-National

Sat 4/18

6:00 am-10:34 am

1 stop5h 34m

$242

Quickest round-trip

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 4/18

12:05 pm-3:05 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Mon 4/20

8:00 am-9:20 am

Nonstop2h 20m

$243

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 4/23

3:45 pm-6:45 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Mon 4/27

8:00 am-9:20 am

Nonstop2h 20m

$244

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Fri 4/17

8:06 pm-1:00 pm

1 stop15h 54m

Washington, D.C. Reagan-National

Sat 4/18

6:00 pm-7:21 pm

1 stop26h 21m

$246

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 5/2

5:15 am-2:00 pm

2 stops7h 45m

Washington, D.C. Reagan-National

Tue 5/5

10:55 am-5:55 pm

1 stop8h 00m

$248

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Wed 4/15

6:00 am-9:15 am

Nonstop2h 15m

Washington, D.C. Reagan-National

Sat 4/18

7:59 pm-9:25 pm

Nonstop2h 26m

$251

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Wed 4/15

3:43 pm-6:58 pm

Nonstop2h 15m

Washington, D.C. Reagan-National

Sat 4/18

1:44 pm-5:49 pm

1 stop5h 05m

$261

Kansas CityWashington, D.C.

MCI - DCA

MCIDCA

Kansas City

Sun 4/26

2:15 pm-4:59 pm

1 stop25h 44m

Washington, D.C. Reagan-National

Fri 5/1

1:59 pm-2:06 pm

1 stop25h 07m

$291

SpringfieldWashington, D.C.

SGF - DCA

SGFDCA

Springfield-Branson

Wed 4/8

11:23 am-5:04 pm

1 stop4h 41m

Washington, D.C. Reagan-National

Sat 4/11

8:20 am-2:35 pm

1 stop7h 15m

$339

ColumbiaWashington, D.C.

COU - DCA

COUDCA

Columbia Regional

Sat 4/4

8:00 am-2:14 pm

1 stop5h 14m

Washington, D.C. Reagan-National

Wed 4/8

6:30 am-10:55 am

1 stop5h 25m

$344

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $253. 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 $277.

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 $296. Flights from Missouri to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $383. 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 at noon. Our users have found flights to Washington, D.C. Reagan-National Airport at noon for as low as $326. 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 $346.

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 $336 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 $206 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	$171
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 $171. The best round-trip flight deal from Missouri to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $304.

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?
There are 5 operators available for flights from Missouri to Washington, D.C. Reagan-National Airport as of March 2026.
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?
Based on momondo bookings for flights between Missouri and Washington, D.C. Reagan-National Airport, the leading plane model is Canadair (Bombardier) Regional Jet 900, making up 20.81% of the total bookings. Other popular models include Boeing 737 MAX 8 with 19.13%, Canadair (Bombardier) Regional Jet 700 with 16.04%, and Embraer 175 with 14.90%.

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
Frontier	PriceFrom $98	Free Cancellation	Rating 5.7 3,017 reviews	Search Frontier flights
American Airlines	PriceFrom $150	Free Cancellation	Rating 7.1 11,493 reviews	Search American Airlines flights
Southwest	PriceFrom $197	Free Cancellation	Rating 8.0 4,332 reviews	Search Southwest flights
United Airlines	PriceFrom $238	Free Cancellation	Rating 7.4 9,478 reviews	Search United Airlines flights
Delta	PriceFrom $248	Free Cancellation	Rating 7.9 8,327 reviews	Search Delta flights

Alexandria

National Harbor

Gettysburg

Arlington

Waldorf

Woodbridge

Laurel

Colonial Beach

Gaithersburg

Towson

Silver Spring

Fredericksburg

Rockville

Tysons

Manassas

Linthicum Heights

Springfield

Bethesda

Fairfax

College Park

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.

An easier way to manage your Washington, D.C. Reagan-National Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Fri 4/24

Fri 5/1

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington, D.C.

Popular cities

Other flights from Missouri

Other flights to Washington, D.C.

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in the United States

Flights to New York John F Kennedy Intl Airportfrom $91

Flights to Newark Airportfrom $68

Flights to New York LaGuardia Airportfrom $69

Flights to Chicago O'Hare Intl Airportfrom $72

Flights to Dallas/Fort Worth Airportfrom $54

Flights to Washington, D.C. Dulles Intl Airportfrom $56

Flights to Orlando Airportfrom $46

Flights to Chicago Midway Airportfrom $70

Flights to Dallas Love Field Airport

Flights to Chicago Greater Rockford Airport

Cheap flights from Missouri to Washington, D.C. from $70

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 4/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Missouri to Washington, D.C.

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

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

Our best Frontier deals on Missouri to Washington, D.C. Reagan-National Airport flight tickets

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

Our best American Airlines deals on Missouri to Washington, D.C. Reagan-National Airport flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Missouri to Washington, D.C. Reagan-National Airport that are best for you.

See travel insights to Washington, D.C. from

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

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

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

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

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

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

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

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

What is the cheapest airline that flies from Missouri to Washington, D.C. Reagan-National?

What airlines fly to Washington, D.C. Reagan-National Airport?

How many flights depart from Missouri to Washington, D.C. Reagan-National Airport on average per day?

How many flights depart from Missouri to Washington, D.C. Reagan-National Airport on average per week?

How long does it take to fly 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

Fastest flight time

Direct flights

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

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

Why use momondo?

An easier way to manage your Washington, D.C. Reagan-National Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington, D.C.

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Missouri flight routes

According to popular flight searches on momondo this year

Washington, D.C. Reagan-National Airport flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Washington, D.C.

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Washington, D.C.

List of cabin classes available on flights landing in Washington, D.C.. Availability may vary depending on flight origin and airline.

Complete your trip to Washington, D.C.

Explore popular destinations other users love

According to popular flight searches on momondo this year