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Cheap flights from London Stansted Airport to Washington, D.C. from £398

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 7/9. 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 return flights

Logo
13:20 - 19:59STN-IAD
35h 39m2 stops
Logo
22:05 - 00:20IAD-STN
21h 15m2 stops
£437
Find Deal
Mon, 15 Sep - Sat, 20 Sep
Logo
16:10 - 19:59STN-IAD
32h 49m2 stops
Logo
22:05 - 22:25IAD-STN
19h 20m2 stops
£438
Find Deal
Mon, 8 Sep - Thu, 11 Sep
Logo
06:35 - 19:59STN-IAD
18h 24m2 stops
Logo
22:05 - 00:20IAD-STN
21h 15m2 stops
£439
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Logo
22:10 - 20:50STN-IAD
27h 40m2 stops
Logo
17:50 - 17:30IAD-STN
18h 40m2 stops
£439
Find Deal
Wed, 17 Sep - Wed, 24 Sep
Logo
13:30 - 19:59STN-IAD
35h 29m3 stops
Logo
22:05 - 00:20IAD-STN
21h 15m2 stops
£440
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Logo
17:50 - 15:20STN-IAD
26h 30m2 stops
Logo
17:50 - 19:05IAD-STN
20h 15m2 stops
£442
Find Deal
Thu, 25 Sep - Wed, 1 Oct
Logo
14:50 - 15:20STN-IAD
29h 30m2 stops
Logo
22:20 - 00:10IAD-STN
20h 50m2 stops
£442
Find Deal
Tue, 16 Sep - Tue, 23 Sep
Logo
08:20 - 20:50STN-IAD
17h 30m2 stops
Logo
17:50 - 19:05IAD-STN
20h 15m2 stops
£444
Find Deal
Thu, 25 Sep - Wed, 1 Oct
Logo
07:55 - 19:20STN-IAD
16h 25m2 stops
Logo
20:30 - 19:50IAD-STN
18h 20m2 stops
£445
Find Deal
Thu, 25 Sep - Wed, 1 Oct
Logo
14:50 - 20:50STN-IAD
35h 00m2 stops
Logo
17:45 - 00:10IAD-STN
25h 25m2 stops
£446
Find Deal
Tue, 23 Sep - Mon, 6 Oct

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 21 August 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 15/9

13:20-19:59

2 stops35h 39m

Washington, D.C. Dulles Intl

Sat 20/9

22:05-00:20

2 stops21h 15m

£437

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 8/9

16:10-19:59

2 stops32h 49m

Washington, D.C. Dulles Intl

Thu 11/9

22:05-22:25

2 stops19h 20m

£438

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 13/9

06:35-19:59

2 stops18h 24m

Washington, D.C. Dulles Intl

Sat 20/9

22:05-00:20

2 stops21h 15m

£439

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 17/9

22:10-20:50

2 stops27h 40m

Washington, D.C. Dulles Intl

Wed 24/9

17:50-17:30

2 stops18h 40m

£439

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 13/9

13:30-19:59

3 stops35h 29m

Washington, D.C. Dulles Intl

Sat 20/9

22:05-00:20

2 stops21h 15m

£440

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 25/9

17:50-15:20

2 stops26h 30m

Washington, D.C. Dulles Intl

Wed 1/10

17:50-19:05

2 stops20h 15m

£442

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 16/9

14:50-15:20

2 stops29h 30m

Washington, D.C. Dulles Intl

Tue 23/9

22:20-00:10

2 stops20h 50m

£442

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 25/9

08:20-20:50

2 stops17h 30m

Washington, D.C. Dulles Intl

Wed 1/10

17:50-19:05

2 stops20h 15m

£444

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 25/9

07:55-19:20

2 stops16h 25m

Washington, D.C. Dulles Intl

Wed 1/10

20:30-19:50

2 stops18h 20m

£445

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 23/9

14:50-20:50

2 stops35h 00m

Washington, D.C. Dulles Intl

Mon 6/10

17:45-00:10

2 stops25h 25m

£446

Flights are sorted by cheapest return 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?

According to our data, Wednesday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from London Stansted Airport. The lowest ticket price found for a Wednesday departure recently was £601. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from London Stansted Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £680.

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

The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is in the evening when flights can be purchased for as low as £526. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the afternoon when prices are around £631.

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 return 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?

    Washington, D.C. Dulles Intl is 3683.3 mi away from London Stansted. 11h 05m is a normal flight duration for this route.

  • 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 refresh daily.

  • How many operators does momondo search for flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

  • 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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.

  • What is the most popular airline from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

Best airlines flying from London Stansted Airport to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from London Stansted Airport to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
PLAYPriceFrom £248Free CancellationRating
7.0
103 reviews
Search PLAY flights

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Winchester
Laurel
Essex
Alexandria
Fairfax
Manassas
Bethesda
Oxon Hill
Chantilly
College Park
Linthicum Heights
Gettysburg
Front Royal
Hanover
Cambridge
Ellicott City
Westminster
Arlington
Ashburn
Woodbridge

Why use momondo?

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

Finding the right flight to Washington, D.C. from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from London with this policy.

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

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Washington, D.C. from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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