How many flights depart from St. Louis to Washington, D.C. Dulles Intl Airport on average per day?

6 flights are operational daily from St. Louis to Washington, D.C. Dulles Intl Airport as of October 2026. The most popular departure time for this route is 1:00PM, with 53% of flights per day taking off in the afternoon.

What airlines fly to Washington, D.C. Dulles Intl Airport?

United Airlines, Delta and Frontier are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from St. Louis according to our data. United Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 4 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Lambert-St Louis to Washington, D.C. Dulles Intl?

Frontier and Delta are the most popular carriers operating from Lambert-St Louis to Washington, D.C. Dulles Intl

When did momondo last update prices for flights from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport?

Prices for flights from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport?

The number of operators available for flights from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport is 4 as of October 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Washington, D.C. Dulles Intl 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 Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport.

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

The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$51 Cheap Flights from St. Louis to Washington, D.C. Dulles Intl Airport in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Washington, D.C.

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 11:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 10mnonstop

10:15 am - 3:43 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 28m1 stop Chicago O'Hare Intl

$247United Airlines

Thu, Oct 29 - Mon, Nov 2

1:00 pm - 4:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 09mnonstop

1:17 pm - 4:59 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 42m1 stop Chicago O'Hare Intl

$247United Airlines

Wed, Nov 4 - Sat, Nov 7

4:26 pm - 5:12 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

23h 46m2 stops Orlando Atlanta Hartsfield-Jackson

7:40 am - 5:40 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

11h 00m1 stop Atlanta Hartsfield-Jackson

$249Frontier

Thu, Oct 29 - Mon, Nov 2

6:35 pm - 12:21 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 46m1 stop Atlanta Hartsfield-Jackson

7:50 am - 5:40 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

10h 50m1 stop Atlanta Hartsfield-Jackson

$250Frontier

Wed, Oct 14 - Fri, Oct 16

6:00 pm - 11:21 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 21m1 stop Detroit Metropolitan Wayne County

6:00 am - 11:15 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 15m1 stop Atlanta Hartsfield-Jackson

$257Delta

Mon, Nov 16 - Tue, Nov 17

2:31 pm - 8:10 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 39m1 stop Atlanta Hartsfield-Jackson

12:32 pm - 6:13 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 41m1 stop Atlanta Hartsfield-Jackson

$257Delta

Sat, Nov 14 - Tue, Nov 17

6:43 am - 12:53 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

5h 10m1 stop Charlotte Douglas

8:07 pm - 11:58 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 51m1 stop Charlotte Douglas

$257American Airlines

Thu, Nov 19 - Tue, Dec 1

6:00 am - 11:17 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 17m1 stop Charlotte Douglas

1:24 pm - 7:08 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

6h 44m1 stop Charlotte Douglas

$257American Airlines

Sat, Nov 14 - Thu, Nov 19

2:00 pm - 10:21 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

19h 21m3 stops Jonesboro Nashville Intl Orlando

7:32 am - 5:42 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

11h 10m1 stop Atlanta Hartsfield-Jackson

$312Multiple Airlines

Thu, Nov 5 - Mon, Nov 9

2:00 pm - 10:21 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

19h 21m3 stops Jonesboro Nashville Intl Orlando

7:32 am - 5:42 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

11h 10m1 stop Atlanta Hartsfield-Jackson

$313Multiple Airlines

Thu, Nov 5 - Mon, Nov 9

Cheap last minute flights

Enter your travel dates to find the best prices.

2:29 pm - 12:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

8h 41m1 stop Atlanta Hartsfield-Jackson

11:12 am - 11:13 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

13h 01m1 stop Orlando

$371Frontier

Wed, Oct 7 - Mon, Oct 12

2:29 pm - 12:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

8h 41m1 stop Atlanta Hartsfield-Jackson

11:12 am - 11:13 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

13h 01m1 stop Orlando

$371Frontier

Wed, Oct 7 - Thu, Oct 8

3:30 pm - 11:33 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

7h 03m1 stop Charlotte Douglas

5:01 am - 8:37 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 36m1 stop Charlotte Douglas

$461American Airlines

Tue, Oct 6 - Thu, Oct 8

1:09 pm - 4:25 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 16mnonstop

5:55 pm - 7:21 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 26mnonstop

$505United Airlines

Tue, Oct 6 - Tue, Oct 13

1:09 pm - 4:25 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 16mnonstop

5:55 pm - 7:21 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 26mnonstop

$505United Airlines

Wed, Oct 7 - Tue, Oct 13

6:00 am - 11:32 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 32m1 stop Atlanta Hartsfield-Jackson

6:05 am - 9:49 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

4h 44m1 stop Detroit Metropolitan Wayne County

$525Delta

Wed, Oct 7 - Tue, Oct 13

10:22 am - 5:45 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

6h 23m1 stop Charlotte Douglas

6:25 pm - 11:04 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 39m1 stop Charlotte Douglas

$525American Airlines

Tue, Oct 6 - Tue, Oct 13

7:20 pm - 12:42 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

4h 22m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:51 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

5h 51m1 stop Atlanta Hartsfield-Jackson

$554Delta

Fri, Oct 9 - Sat, Oct 17

2:00 pm - 10:17 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

19h 17m3 stops Jonesboro Nashville Intl Orlando

11:12 am - 11:13 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

13h 01m1 stop Orlando

$621Multiple Airlines

Fri, Oct 9 - Mon, Oct 12

2:00 pm - 10:17 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

19h 17m3 stops Jonesboro Nashville Intl Orlando

11:12 am - 11:13 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

13h 01m1 stop Orlando

$694Multiple Airlines

Thu, Oct 8 - Mon, Oct 12

Cheap direct flights

Enter your travel dates to find the best prices.

1:17 pm - 4:25 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 08mnonstop

8:30 am - 10:03 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 33mnonstop

$260United Airlines

Tue, Dec 1 - Sat, Dec 5

8:00 am - 11:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 10mnonstop

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

$301United Airlines

Sat, Nov 14 - Thu, Nov 19

8:00 am - 11:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 10mnonstop

5:55 pm - 7:30 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 35mnonstop

$306United Airlines

Tue, Oct 27 - Wed, Oct 28

8:00 am - 11:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 10mnonstop

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

$308United Airlines

Sat, Nov 14 - Thu, Nov 19

8:00 am - 11:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 10mnonstop

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

$312United Airlines

Thu, Nov 5 - Sun, Nov 8

1:00 pm - 4:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 09mnonstop

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

$325United Airlines

Mon, Oct 26 - Thu, Oct 29

1:00 pm - 4:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 09mnonstop

5:55 pm - 7:30 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 35mnonstop

$336United Airlines

Wed, Nov 4 - Sat, Nov 7

1:00 pm - 4:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 09mnonstop

5:55 pm - 7:30 pmIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 35mnonstop

$337United Airlines

Thu, Nov 5 - Sat, Nov 7

8:00 am - 11:10 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 10mnonstop

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

$338United Airlines

Thu, Oct 29 - Thu, Nov 5

1:00 pm - 4:09 pmSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 09mnonstop

8:40 am - 10:12 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 32mnonstop

$345United Airlines

Sat, Nov 14 - Thu, Nov 19

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Frontier flights from St. Louis to Washington, D.C. Dulles Intl Airport

Our best Frontier deals on St. Louis to Washington, D.C. Dulles Intl Airport flight tickets

Frontier

Oct 29

STL4:26 pmLambert-St Louis

23h 46m

2 stops

IAD5:12 pmWashington, D.C. Dulles Intl

Nov 2

IAD7:40 amWashington, D.C. Dulles Intl

11h 00m

1 stop

STL5:40 pmLambert-St Louis

$249

Frontier

Oct 14

STL6:35 pmLambert-St Louis

4h 46m

1 stop

IAD12:21 amWashington, D.C. Dulles Intl

Oct 16

IAD7:50 amWashington, D.C. Dulles Intl

10h 50m

1 stop

STL5:40 pmLambert-St Louis

$250

Frontier

Oct 12

STL6:35 pmLambert-St Louis

28h 46m

1 stop

IAD12:21 amWashington, D.C. Dulles Intl

Oct 22

IAD9:06 pmWashington, D.C. Dulles Intl

21h 34m

1 stop

STL5:40 pmLambert-St Louis

$251

United Airlines flights from St. Louis to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on St. Louis to Washington, D.C. Dulles Intl Airport flight tickets

United Airlines

Oct 27

STL1:08 pmLambert-St Louis

7h 00m

1 stop

IAD9:08 pmWashington, D.C. Dulles Intl

Nov 3

IAD5:55 pmWashington, D.C. Dulles Intl

2h 35m

STL7:30 pmLambert-St Louis

$247

United Airlines

Dec 1

STL1:17 pmLambert-St Louis

2h 08m

IAD4:25 pmWashington, D.C. Dulles Intl

Dec 5

IAD8:30 amWashington, D.C. Dulles Intl

2h 33m

STL10:03 amLambert-St Louis

$260

United Airlines

Nov 6

STL1:00 pmLambert-St Louis

2h 09m

IAD4:09 pmWashington, D.C. Dulles Intl

Nov 12

IAD8:23 amWashington, D.C. Dulles Intl

4h 47m

1 stop

STL12:10 pmLambert-St Louis

$276

momondo Fare Finder

Use the filters below to find and compare flights from St. Louis to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Thu 10/29

8:00 am-11:10 am

Nonstop2h 10m

Washington, D.C. Dulles Intl

Mon 11/2

10:15 am-3:43 pm

1 stop6h 28m

$247

Quickest round-trip

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Wed 11/4

1:00 pm-4:09 pm

Nonstop2h 09m

Washington, D.C. Dulles Intl

Sat 11/7

1:17 pm-4:59 pm

1 stop4h 42m

$247

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Thu 10/29

4:26 pm-5:12 pm

2 stops23h 46m

Washington, D.C. Dulles Intl

Mon 11/2

7:40 am-5:40 pm

1 stop11h 00m

$249

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Wed 10/14

6:35 pm-12:21 am

1 stop4h 46m

Washington, D.C. Dulles Intl

Fri 10/16

7:50 am-5:40 pm

1 stop10h 50m

$250

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Mon 11/16

6:00 pm-11:21 pm

1 stop4h 21m

Washington, D.C. Dulles Intl

Tue 11/17

6:00 am-11:15 am

1 stop6h 15m

$257

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Sat 11/14

2:31 pm-8:10 pm

1 stop4h 39m

Washington, D.C. Dulles Intl

Tue 11/17

12:32 pm-6:13 pm

1 stop6h 41m

$257

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Thu 11/19

6:43 am-12:53 pm

1 stop5h 10m

Washington, D.C. Dulles Intl

Tue 12/1

8:07 pm-11:58 pm

1 stop4h 51m

$257

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Sat 11/14

6:00 am-11:17 am

1 stop4h 17m

Washington, D.C. Dulles Intl

Thu 11/19

1:24 pm-7:08 pm

1 stop6h 44m

$257

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Thu 11/5

2:00 pm-10:21 am

3 stops19h 21m

Washington, D.C. Dulles Intl

Mon 11/9

7:32 am-5:42 pm

1 stop11h 10m

$312

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Thu 11/5

2:00 pm-10:21 am

3 stops19h 21m

Washington, D.C. Dulles Intl

Mon 11/9

7:32 am-5:42 pm

1 stop11h 10m

$313

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 St. Louis to Washington, D.C. Dulles Intl 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 typical price of a round-trip flight between St. Louis and Washington, D.C. Dulles Intl Airport?

Prices are currently typical for flights on this route.

Typical prices usually range from $238 to $515.
The lowest price recently found on this route was $247.

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

In general, February is the cheapest month to fly from St. Louis to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $170. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $352.

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

Our data shows that Wednesday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $702. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Washington, D.C. Dulles Intl Airport for around $1,305.

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

Flying to Washington, D.C. Dulles Intl Airport from St. Louis in the morning is the least expensive time of day to depart. momondo users have found prices as low as $817 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,210 on average. Flights to Washington, D.C. Dulles Intl Airport from St. Louis at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Lambert-St Louis to Washington, D.C. Dulles Intl flight route?

Fly from Lambert-St Louis to Washington, D.C. Dulles Intl for the best Lambert-St Louis - Washington, D.C. Dulles Intl flight prices

What cabin class options are available on St. Louis to Washington, D.C. Dulles Intl Airport flights?

There are 4 cabin classes available to choose from on St. Louis to Washington, D.C. Dulles Intl Airport 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 St. Louis to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 7% on your flight if you consider stops on a St. Louis to Washington, D.C. Dulles Intl Airport flight.

How have St. Louis to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of October 2026, prices for St. Louis to Washington, D.C. Dulles Intl Airport flights are approximately 46% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Washington, D.C. Dulles Intl Airport (STL to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Washington, D.C. Dulles Intl Airport

Best Price Found	$51
Fastest flight time	2h 06m
Direct flights	Every day

The best one-way flight to Washington, D.C. Dulles Intl Airport from St. Louis in the past 72 hours is $51. The best round-trip flight deal from St. Louis to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $247.

The fastest flight from St. Louis to Washington, D.C. Dulles Intl Airport takes 2h 06m

Direct flights go from St. Louis to Washington, D.C. Dulles Intl Airport every day.

Search flight deals

Frequently asked questions about flying from St. Louis to Washington, D.C. Dulles Intl Airport

How far is Lambert-St Louis to Washington, D.C. Dulles Intl by plane?
The straight-line distance from Lambert-St Louis to Washington, D.C. Dulles Intl is 685.9 mi. Flights usually cover this in 2h 06m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport?
Prices for flights from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport?
The number of operators available for flights from Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport is 4 as of October 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Washington, D.C. Dulles Intl 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 Lambert-St Louis Airport to Washington, D.C. Dulles Intl Airport.
What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?
The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from St. Louis to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for flights between St. Louis and Washington, D.C. Dulles Intl Airport, the leading plane model is Canadair (Bombardier) Regional Jet CRJ-550, making up 60.78% of the total bookings. Other popular models include Embraer 175 (Enhanced Winglets) with 9.80%, Embraer 175 with 5.88%, and Canadair (Bombardier) Regional Jet 900 with 5.88%.
What is the most popular airline from St. Louis to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Washington, D.C. Dulles Intl Airport is United Airlines (59% of total bookings). The next most popular airlines are Delta (19%), Frontier (15%), and American Airlines (8%).

Best airlines flying from St. Louis to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Washington, D.C. Dulles Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $90	Free Cancellation	Rating 5.6 2,563 reviews	Search Frontier flights
Delta	PriceFrom $203	Free Cancellation	Rating 7.8 8,627 reviews	Search Delta flights
American Airlines	PriceFrom $257	Free Cancellation	Rating 7.0 12,128 reviews	Search American Airlines flights
United Airlines	PriceFrom $264	Free Cancellation	Rating 7.4 10,280 reviews	Search United Airlines flights

United Airlines Flights From St. Louis to Washington, D.C. Dulles Intl Airport
United Airlines flight deals from St. Louis to Washington, D.C. Dulles Intl Airport start from $264 round-trip. Over the 12 United Airlines flights for this route in a normal week, average airfare is usually $470 round-trip - but some users have found much cheaper deals with momondo.

Alexandria

National Harbor

Arlington

Gettysburg

Winchester

Fredericksburg

Waldorf

Laurel

Woodbridge

Gaithersburg

Linthicum Heights

Rockville

Silver Spring

Towson

Sterling

Fairfax

Springfield

Glen Burnie

Edgewood

Martinsburg

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Washington, D.C. for you.

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

Yes. momondo allows you to filter the results for St. Louis to Washington, D.C. flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Washington, D.C..

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

Yes. momondo can track prices for St. Louis 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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Cheap flights from St. Louis to Washington, D.C. from $51

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Frontier flights from St. Louis to Washington, D.C. Dulles Intl Airport

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