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

Frontier, Delta, and United Airlines are the most popular carriers operating from Missouri to Washington, D.C.

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

As of June 2026, there are 27 flights per day flying from Missouri to Washington, D.C.. The most common time of day flights depart is 12:00PM, with 45% of flights taking off in the afternoon.

How long does it take to fly to Washington, D.C.?

Flight times from Missouri to Washington, D.C. 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 05m on average. Another popular route from Missouri to Washington, D.C. is flying from Kansas City to Washington, D.C. Dulles Intl Airport, which will take roughly 2h 22m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Washington, D.C.?

Southwest, American Airlines and United Airlines are the top three most popular airlines that fly to Washington, D.C. from Missouri according to our data. Southwest is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 5 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

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

190 flights are operational weekly from Missouri to Washington, D.C. as of June 2026. The most popular departure day for this route is Sun, with 21% of flights per week taking off on this day.

When did momondo last update prices for flights from Missouri to Washington, D.C.?

Prices for flights from Missouri to Washington, D.C. refresh daily.

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

As of June 2026, there are 5 operators available to choose from for flights from Missouri to Washington, D.C..

How old do you have to be to fly from Missouri to Washington, D.C.?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Washington, D.C..

What documentation or ID do you need to fly to Washington, D.C.?

The travel and health documents you'll need for your trip to Washington, D.C. may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C.. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$72 Cheap Flights from Missouri to Washington, D.C. in 2026

Discover deals from 900+ travel sites with momondo.

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.

4:57 pm - 11:17 pm

STL

BWI

5h 20m

1 stop

8:36 am - 5:37 pm

BWI

STL

10h 01m

1 stop

$144Frontier

Wed, Jul 15 - Tue, Jul 28

6:07 pm - 7:26 am

MCI

BWI

12h 19m

1 stop

9:37 pm - 5:10 pm

BWI

MCI

20h 33m

1 stop

$144Frontier

Fri, Jul 17 - Tue, Jul 21

10:10 am - 6:00 pm

STL

DCA

6h 50m

2 stops

4:35 pm - 10:05 pm

DCA

STL

6h 30m

1 stop

$270Southwest

Thu, Aug 6 - Mon, Aug 10

3:30 pm - 6:30 pm

STL

DCA

2h 00mnonstop

7:25 am - 2:25 pm

DCA

STL

8h 00m

2 stops

$271Southwest

Mon, Aug 3 - Wed, Aug 5

5:45 pm - 9:26 pm

MCI

IAD

2h 41mnonstop

10:31 am - 4:00 pm

IAD

MCI

6h 29m

1 stop

$271United Airlines

Sat, Jul 25 - Tue, Jul 28

1:15 pm - 7:48 pm

STL

DCA

5h 33m

1 stop

6:20 am - 11:47 am

DCA

STL

6h 27m

1 stop

$273Delta

Sat, Jul 25 - Thu, Aug 6

9:23 am - 1:08 pm

MCI

DCA

2h 45mnonstop

3:11 pm - 6:48 pm

DCA

MCI

4h 37m

1 stop

$274American Airlines

Thu, Aug 20 - Wed, Aug 26

12:30 pm - 4:03 pm

MCI

IAD

2h 33mnonstop

5:45 pm - 11:59 pm

IAD

MCI

7h 14m

1 stop

$275United Airlines

Wed, Aug 5 - Tue, Aug 11

6:43 am - 9:46 am

STL

DCA

2h 03mnonstop

8:00 pm - 9:21 pm

DCA

STL

2h 21mnonstop

$275American Airlines

Mon, Jul 20 - Mon, Aug 3

6:09 pm - 10:59 pm

STL

DCA

3h 50m

1 stop

12:27 pm - 4:17 pm

DCA

STL

4h 50m

1 stop

$276Delta

Mon, Jul 27 - Tue, Aug 4

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

United Airlines flights from Missouri to Washington, D.C.

Our best United Airlines deals on Missouri to Washington, D.C. flight tickets

United Airlines

Jul 25

MCI5:45 pmKansas City

2h 41m

IAD9:26 pmWashington, D.C. Dulles Intl

Jul 28

IAD10:31 amWashington, D.C. Dulles Intl

6h 29m

1 stop

MCI4:00 pmKansas City

$271

United Airlines

Aug 5

MCI7:53 amKansas City

5h 19m

1 stop

IAD2:12 pmWashington, D.C. Dulles Intl

Aug 12

IAD1:00 pmWashington, D.C. Dulles Intl

2h 50m

MCI2:50 pmKansas City

$275

United Airlines

Aug 4

MCI12:30 pmKansas City

2h 33m

IAD4:03 pmWashington, D.C. Dulles Intl

Aug 5

IAD12:55 pmWashington, D.C. Dulles Intl

2h 50m

MCI2:45 pmKansas City

$276

Delta flights from Missouri to Washington, D.C.

Our best Delta deals on Missouri to Washington, D.C. flight tickets

Delta

Jul 25

STL1:15 pmLambert-St Louis

5h 33m

1 stop

DCA7:48 pmWashington, D.C. Reagan-National

Aug 6

DCA6:20 amWashington, D.C. Reagan-National

6h 27m

1 stop

STL11:47 amLambert-St Louis

$273

Delta

Jul 27

STL6:09 pmLambert-St Louis

3h 50m

1 stop

DCA10:59 pmWashington, D.C. Reagan-National

Aug 4

DCA12:27 pmWashington, D.C. Reagan-National

4h 50m

1 stop

STL4:17 pmLambert-St Louis

$276

Delta

Aug 5

MCI5:43 amKansas City

4h 50m

1 stop

IAD11:33 amWashington, D.C. Dulles Intl

Aug 12

IAD8:28 amWashington, D.C. Dulles Intl

6h 24m

1 stop

MCI1:52 pmKansas City

$281

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Wed 7/15

4:57 pm-11:17 pm

1 stop5h 20m

Baltimore/Washington

Tue 7/28

8:36 am-5:37 pm

1 stop10h 01m

$144

Kansas CityBaltimore

MCI - BWI

MCIBWI

Kansas City

Fri 7/17

6:07 pm-7:26 am

1 stop12h 19m

Baltimore/Washington

Tue 7/21

9:37 pm-5:10 pm

1 stop20h 33m

$144

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 8/6

10:10 am-6:00 pm

2 stops6h 50m

Washington, D.C. Reagan-National

Mon 8/10

4:35 pm-10:05 pm

1 stop6h 30m

$270

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 8/3

3:30 pm-6:30 pm

Nonstop2h 00m

Washington, D.C. Reagan-National

Wed 8/5

7:25 am-2:25 pm

2 stops8h 00m

$271

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Sat 7/25

5:45 pm-9:26 pm

Nonstop2h 41m

Washington, D.C. Dulles Intl

Tue 7/28

10:31 am-4:00 pm

1 stop6h 29m

$271

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 7/25

1:15 pm-7:48 pm

1 stop5h 33m

Washington, D.C. Reagan-National

Thu 8/6

6:20 am-11:47 am

1 stop6h 27m

$273

Kansas CityWashington, D.C.

MCI - DCA

MCIDCA

Kansas City

Thu 8/20

9:23 am-1:08 pm

Nonstop2h 45m

Washington, D.C. Reagan-National

Wed 8/26

3:11 pm-6:48 pm

1 stop4h 37m

$274

Kansas CityWashington, D.C.

MCI - IAD

MCIIAD

Kansas City

Wed 8/5

12:30 pm-4:03 pm

Nonstop2h 33m

Washington, D.C. Dulles Intl

Tue 8/11

5:45 pm-11:59 pm

1 stop7h 14m

$275

Quickest round-trip

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 7/20

6:43 am-9:46 am

Nonstop2h 03m

Washington, D.C. Reagan-National

Mon 8/3

8:00 pm-9:21 pm

Nonstop2h 21m

$275

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 7/27

6:09 pm-10:59 pm

1 stop3h 50m

Washington, D.C. Reagan-National

Tue 8/4

12:27 pm-4:17 pm

1 stop4h 50m

$276

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.

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.?

The month of August is, on average, the cheapest month to fly to Washington, D.C. from Missouri, with most prices found around $67. If you’re not able to fly to Washington, D.C. in August, then November is your next best option. Flight prices from Missouri to Washington, D.C. during November average around $72.

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

On average, the least expensive day to fly to Washington, D.C. from Missouri is on a Friday. momondo users have found tickets for Friday departures for as low as $382. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Missouri to Washington, D.C. for around $479.

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

In the afternoon is the cheapest time of day to fly from Missouri to Washington, D.C. when you can find flight prices for as low as $344. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $548. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

How far in advance should I book a flight from Missouri to Washington, D.C.?

You are more likely to see cheaper flights to Washington, D.C. from Missouri when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $372 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Missouri for as low as $263 on momondo.

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

There are 4 cabin classes available to choose from on Missouri to Washington, D.C. 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. flights?

You could potentially save up to 43% on your flight if you consider stops on a Missouri to Washington, D.C. flight.

Cheap Missouri to Washington, D.C. flight deals and tips

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

Best Price Found	$191
Fastest flight time	1h 55m
Direct flights	Every day
Airports in Washington, D.C.	2 airports

The best one-way flight to Washington, D.C. from Missouri in the past 72 hours is $191. The best round-trip flight deal from Missouri to Washington, D.C. found on momondo in the last 72 hours is $325.

The fastest flight from Missouri to Washington, D.C. takes 1h 55m

Direct flights go from Missouri to Washington, D.C. every day.

There are 2 airports in Washington, D.C.. From Missouri there are direct flights to Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD).

Search flight deals

Frequently asked questions about flying from Missouri to Washington, D.C.

When did momondo last update prices for flights from Missouri to Washington, D.C.?
Prices for flights from Missouri to Washington, D.C. refresh daily.
How many operators does momondo search for flights from Missouri to Washington, D.C.?
As of June 2026, there are 5 operators available to choose from for flights from Missouri to Washington, D.C..
How old do you have to be to fly from Missouri to Washington, D.C.?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The travel and health documents you'll need for your trip to Washington, D.C. may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C.. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Missouri to Washington, D.C.?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Missouri to Washington, D.C. is Boeing 737 MAX 8 (18.96% of total bookings). The next most popular plane models are Canadair (Bombardier) Regional Jet 900 (18.21%), Canadair (Bombardier) Regional Jet 700 (15.11%), and Boeing 737-800 Passenger/BBJ2 (winglets) (8.34%).

Best airlines flying from Missouri to Washington, D.C.

Compare and see reviews for airlines that fly from Missouri to Washington, D.C. with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $80	Free Cancellation	Rating 5.6 2,856 reviews	Search Frontier flights
Delta	PriceFrom $98	Free Cancellation	Rating 7.8 8,454 reviews	Search Delta flights
American Airlines	PriceFrom $158	Free Cancellation	Rating 7.1 11,774 reviews	Search American Airlines flights
Southwest	PriceFrom $199	Free Cancellation	Rating 7.9 4,246 reviews	Search Southwest flights
United Airlines	PriceFrom $244	Free Cancellation	Rating 7.4 9,899 reviews	Search United Airlines flights

Alexandria

National Harbor

Arlington

Gettysburg

Waldorf

Laurel

Woodbridge

Fredericksburg

Gaithersburg

Colonial Beach

Linthicum Heights

Rockville

Silver Spring

Towson

Manassas

Tysons

Springfield

Fairfax

Bethesda

Glen Burnie

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 for Missouri to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Missouri and alert you when they change.

An easier way to manage your Washington, D.C. 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

Tue 7/28

Tue 8/4

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 the United States

Nearby airports

Airlines

Cabin classes

Other United States destinations

Other flights from Missouri

Complete your trip

Feeling lucky

Fly into one of these airports located in Washington, D.C.

Washington, D.C. Reagan-National Airport

Washington, D.C. Dulles Intl Airport

Cheap flights from Missouri to Washington, D.C. from $72

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 7/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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

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

United Airlines flights from Missouri to Washington, D.C.

Our best United Airlines deals on Missouri to Washington, D.C. flight tickets

Delta flights from Missouri to Washington, D.C.

Our best Delta deals on Missouri to Washington, D.C. flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Missouri to Washington, D.C. 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.

What is the cheapest month to fly to Washington, D.C.?

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

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

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

How far in advance should I book a flight from Missouri to Washington, D.C.?

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

Can stopping save me money on Missouri to Washington, D.C. flights?

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

What airlines fly to Washington, D.C.?

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

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

How long does it take to fly to Washington, D.C.?

Cheap Missouri to Washington, D.C. flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Washington, D.C.

Frequently asked questions about flying from Missouri to Washington, D.C.

Best airlines flying from Missouri to Washington, D.C.

Compare and see reviews for airlines that fly from Missouri to Washington, D.C. with momondo

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

Why use momondo?

An easier way to manage your Washington, D.C. 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 the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.

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.

Popular cities in the United States

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

Fly to other destinations from Missouri

According to popular flight searches on momondo this year

Complete your trip to Washington, D.C.

Explore popular destinations other users love

According to popular flight searches on momondo this year