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Cheap flights from London Stansted Airport to Washington, D.C. from $506

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Stansted Airport to Washington, D.C. departing on 12/1. 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 London Stansted Airport to Washington, D.C.

Cheap round-trip flights

Logo
6:10 am - 6:30 pmSTN-IAD
17h 20m2 stops
Logo
7:40 pm - 8:45 pmIAD-STN
20h 05m2 stops
$538
Find Deal
Mon, Nov 10 - Fri, Nov 14
Logo
10:35 am - 4:15 pmSTN-IAD
34h 40m2 stops
Logo
10:20 am - 8:55 pmIAD-STN
29h 35m2 stops
$547
Find Deal
Wed, Oct 1 - Wed, Oct 8
Logo
8:30 am - 7:30 pmSTN-IAD
15h 00m2 stops
Logo
7:40 pm - 5:50 pmIAD-STN
17h 10m2 stops
$553
Find Deal
Wed, Oct 29 - Wed, Nov 5
Logo
10:55 pm - 7:20 pmSTN-IAD
25h 25m2 stops
Logo
8:30 pm - 8:55 pmIAD-STN
19h 25m2 stops
$556
Find Deal
Thu, Oct 9 - Wed, Oct 15
Logo
10:35 am - 4:15 pmSTN-IAD
34h 40m2 stops
Logo
10:20 am - 12:45 pmIAD-STN
21h 25m2 stops
$558
Find Deal
Wed, Oct 1 - Wed, Oct 8
Logo
8:30 am - 7:30 pmSTN-IAD
15h 00m2 stops
Logo
7:40 pm - 1:20 pmIAD-STN
12h 40m2 stops
$559
Find Deal
Wed, Oct 29 - Wed, Nov 5
Logo
8:30 am - 4:35 pmSTN-IAD
12h 05m1 stop
Logo
9:00 pm - 5:50 pmIAD-STN
15h 50m1 stop
$561
Find Deal
Wed, Oct 29 - Wed, Nov 5
Logo
6:30 am - 4:35 pmSTN-IAD
14h 05m1 stop
Logo
9:00 pm - 4:50 pmIAD-STN
14h 50m1 stop
$563
Find Deal
Tue, Oct 28 - Tue, Nov 4
Logo
8:30 am - 4:35 pmSTN-IAD
12h 05m1 stop
Logo
10:00 pm - 4:35 pmIAD-STN
14h 35m1 stop
$564
Find Deal
Sun, Oct 26 - Fri, Oct 31
Logo
8:15 am - 3:50 pmSTN-IAD
12h 35m1 stop
Logo
8:25 pm - 4:05 pmIAD-STN
14h 40m1 stop
$568
Find Deal
Fri, Oct 3 - Mon, Oct 6

momondo Fare Finder

 
Customize your flight search to find flights from London Stansted Airport to Washington, D.C. Dulles Intl 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 15, 2025.
Use the filters below to find and compare flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 11/10

6:10 am-6:30 pm

2 stops17h 20m

Washington, D.C. Dulles Intl

Fri 11/14

7:40 pm-8:45 pm

2 stops20h 05m

$538

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 10/1

10:35 am-4:15 pm

2 stops34h 40m

Washington, D.C. Dulles Intl

Wed 10/8

10:20 am-8:55 pm

2 stops29h 35m

$547

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 10/29

8:30 am-7:30 pm

2 stops15h 00m

Washington, D.C. Dulles Intl

Wed 11/5

7:40 pm-5:50 pm

2 stops17h 10m

$553

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 10/9

10:55 pm-7:20 pm

2 stops25h 25m

Washington, D.C. Dulles Intl

Wed 10/15

8:30 pm-8:55 pm

2 stops19h 25m

$556

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 10/1

10:35 am-4:15 pm

2 stops34h 40m

Washington, D.C. Dulles Intl

Wed 10/8

10:20 am-12:45 pm

2 stops21h 25m

$558

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 10/29

8:30 am-7:30 pm

2 stops15h 00m

Washington, D.C. Dulles Intl

Wed 11/5

7:40 pm-1:20 pm

2 stops12h 40m

$559

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 10/29

8:30 am-4:35 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Wed 11/5

9:00 pm-5:50 pm

1 stop15h 50m

$561

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 10/28

6:30 am-4:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

Tue 11/4

9:00 pm-4:50 pm

1 stop14h 50m

$563

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sun 10/26

8:30 am-4:35 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Fri 10/31

10:00 pm-4:35 pm

1 stop14h 35m

$564

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 10/3

8:15 am-3:50 pm

1 stop12h 35m

Washington, D.C. Dulles Intl

Mon 10/6

8:25 pm-4:05 pm

1 stop14h 40m

$568

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 London Stansted Airport 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

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

Our data shows that Thursday 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 $805. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Stansted Airport to Washington, D.C. Dulles Intl Airport for around $938.

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 London Stansted Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $867 on average. Flights to Washington, D.C. Dulles Intl Airport from London Stansted Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London Stansted Airport 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 London Stansted Airport to Washington, D.C. Dulles Intl Airport (STN to IAD) flight deals and tips

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

Direct flights

None
There are no direct flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Stansted Airport to Washington, D.C. Dulles Intl Airport.
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  • How far is London Stansted to Washington, D.C. Dulles Intl by plane?

    The distance between London Stansted and Washington, D.C. Dulles Intl is about 3683.3 mi. Flights usually cover this in 12h 05m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport were last updated today.

  • How old do you have to be to fly from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

    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 London Stansted 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.

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
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Manassas
Reston
Fairfax
Glen Burnie
Gaithersburg

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from London.

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

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

How can momondo help me find flights from London 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 London.

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

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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