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Cheap flights from London Stansted Airport to Washington, D.C. from £399

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 20/2. 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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0 bags
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Find the cheapest flights from London Stansted Airport to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:30 - 18:30
STN
-
IAD
17h 00m
2 stops
Multiple Airlines Logo
19:40 - 16:35
IAD
-
STN
15h 55m
2 stops
£429Multiple Airlines
Mon, 2 Feb - Thu, 5 Feb
Multiple Airlines Logo
06:30 - 18:30
STN
-
IAD
17h 00m
2 stops
Multiple Airlines Logo
19:40 - 23:00
IAD
-
STN
22h 20m
2 stops
£431Multiple Airlines
Thu, 26 Feb - Sun, 1 Mar
Multiple Airlines Logo
08:55 - 15:15
STN
-
IAD
35h 20m
2 stops
Multiple Airlines Logo
17:30 - 23:50
IAD
-
STN
25h 20m
2 stops
£441Multiple Airlines
Sun, 1 Mar - Tue, 3 Mar
Multiple Airlines Logo
06:30 - 15:35
STN
-
IAD
14h 05m
1 stop
Multiple Airlines Logo
18:05 - 07:50
IAD
-
STN
9h 45m
1 stop
£445Multiple Airlines
Wed, 4 Mar - Wed, 11 Mar
Multiple Airlines Logo
08:30 - 15:35
STN
-
IAD
12h 05m
1 stop
Multiple Airlines Logo
18:05 - 07:50
IAD
-
STN
9h 45m
1 stop
£448Multiple Airlines
Wed, 4 Mar - Wed, 11 Mar
Multiple Airlines Logo
09:35 - 14:35
STN
-
IAD
34h 00m
2 stops
Multiple Airlines Logo
19:40 - 22:15
IAD
-
STN
21h 35m
2 stops
£448Multiple Airlines
Mon, 23 Feb - Wed, 25 Feb
Multiple Airlines Logo
11:55 - 15:35
STN
-
IAD
31h 40m
2 stops
Multiple Airlines Logo
18:30 - 23:55
IAD
-
STN
25h 25m
2 stops
£451Multiple Airlines
Mon, 9 Mar - Mon, 16 Mar
Multiple Airlines Logo
07:35 - 18:30
STN
-
IAD
15h 55m
2 stops
Multiple Airlines Logo
19:40 - 23:40
IAD
-
STN
23h 00m
2 stops
£453Multiple Airlines
Mon, 2 Feb - Thu, 5 Feb
Multiple Airlines Logo
14:35 - 21:00
STN
-
IAD
35h 25m
2 stops
Multiple Airlines Logo
18:30 - 23:55
IAD
-
STN
25h 25m
2 stops
£456Multiple Airlines
Thu, 5 Mar - Mon, 16 Mar
Multiple Airlines Logo
08:30 - 18:30
STN
-
IAD
15h 00m
2 stops
Multiple Airlines Logo
19:40 - 23:05
IAD
-
STN
22h 25m
2 stops
£460Multiple Airlines
Tue, 3 Feb - Sat, 7 Feb

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 January 2026.
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 2/2

06:30-18:30

2 stops17h 00m

Washington, D.C. Dulles Intl

Thu 5/2

19:40-16:35

2 stops15h 55m

£429

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 26/2

06:30-18:30

2 stops17h 00m

Washington, D.C. Dulles Intl

Sun 1/3

19:40-23:00

2 stops22h 20m

£431

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sun 1/3

08:55-15:15

2 stops35h 20m

Washington, D.C. Dulles Intl

Tue 3/3

17:30-23:50

2 stops25h 20m

£441

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 4/3

06:30-15:35

1 stop14h 05m

Washington, D.C. Dulles Intl

Wed 11/3

18:05-07:50

1 stop9h 45m

£445

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 4/3

08:30-15:35

1 stop12h 05m

Washington, D.C. Dulles Intl

Wed 11/3

18:05-07:50

1 stop9h 45m

£448

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 23/2

09:35-14:35

2 stops34h 00m

Washington, D.C. Dulles Intl

Wed 25/2

19:40-22:15

2 stops21h 35m

£448

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 9/3

11:55-15:35

2 stops31h 40m

Washington, D.C. Dulles Intl

Mon 16/3

18:30-23:55

2 stops25h 25m

£451

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 2/2

07:35-18:30

2 stops15h 55m

Washington, D.C. Dulles Intl

Thu 5/2

19:40-23:40

2 stops23h 00m

£453

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 5/3

14:35-21:00

2 stops35h 25m

Washington, D.C. Dulles Intl

Mon 16/3

18:30-23:55

2 stops25h 25m

£456

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 3/2

08:30-18:30

2 stops15h 00m

Washington, D.C. Dulles Intl

Sat 7/2

19:40-23:05

2 stops22h 25m

£460

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, Thursday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from London Stansted Airport. The lowest ticket price found for a Thursday departure recently was £583. 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 £633.

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 at midday when flights can be purchased for as low as £594. 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 £597.

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

Fastest flight time

12h 15m

Direct flights

None
The fastest flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport takes 12h 15m
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. 12h 15m 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 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.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Laurel
College Park
Fairfax
Arlington
Linthicum Heights
Alexandria
Glen Burnie
Front Royal
Lutherville Timonium
Winchester
Ellicott City
Cambridge
Lexington Park
Westminster
Woodbridge
Bethesda
Ashburn
Sterling
Silver Spring
Owings Mills

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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