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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $442

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to London departing on 8/15. 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 Washington, D.C. Dulles Intl Airport to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 pm - 9:40 pm
IAD
-
STN
20h 10m
2 stops
Multiple Airlines Logo
8:10 am - 3:10 pm
STN
-
IAD
36h 00m
2 stops
$842Multiple Airlines
Sat, Aug 15 - Mon, Sep 14
Multiple Airlines Logo
4:05 pm - 11:05 pm
IAD
-
STN
26h 00m
2 stops
Multiple Airlines Logo
6:30 am - 8:40 pm
STN
-
IAD
19h 10m
3 stops
$843Multiple Airlines
Fri, Jun 5 - Mon, Jun 8
Multiple Airlines Logo
8:18 am - 10:40 pm
IAD
-
STN
33h 22m
3 stops
Multiple Airlines Logo
6:35 am - 7:44 am
STN
-
IAD
30h 09m
3 stops
$844Multiple Airlines
Tue, Jun 16 - Sat, Jun 20
Multiple Airlines Logo
9:55 am - 9:00 pm
IAD
-
STN
30h 05m
2 stops
Multiple Airlines Logo
9:30 pm - 1:35 pm
STN
-
IAD
21h 05m
2 stops
$845Multiple Airlines
Tue, Aug 4 - Wed, Aug 19
Royal Air Maroc Logo
9:00 pm - 6:20 am
IAD
-
STN
28h 20m
1 stop
Royal Air Maroc Logo
7:25 am - 7:00 pm
STN
-
IAD
16h 35m
1 stop
$846Royal Air Maroc
Wed, Sep 30 - Fri, Oct 9
Royal Air Maroc Logo
9:00 pm - 6:20 am
IAD
-
STN
28h 20m
1 stop
Royal Air Maroc Logo
7:25 am - 7:00 pm
STN
-
IAD
16h 35m
1 stop
$847Royal Air Maroc
Wed, Sep 30 - Sun, Oct 4
Multiple Airlines Logo
8:30 pm - 10:55 pm
IAD
-
STN
21h 25m
2 stops
Multiple Airlines Logo
8:10 am - 7:00 pm
STN
-
IAD
15h 50m
2 stops
$848Multiple Airlines
Thu, Oct 1 - Mon, Oct 5
Multiple Airlines Logo
5:15 pm - 10:40 pm
IAD
-
STN
24h 25m
2 stops
Multiple Airlines Logo
3:05 pm - 3:10 pm
STN
-
IAD
29h 05m
2 stops
$849Multiple Airlines
Tue, Jun 9 - Sat, Jun 13
Multiple Airlines Logo
8:18 am - 10:40 pm
IAD
-
STN
33h 22m
3 stops
Multiple Airlines Logo
10:00 pm - 7:01 pm
STN
-
IAD
26h 01m
3 stops
$850Multiple Airlines
Tue, Jun 16 - Tue, Jun 23
Multiple Airlines Logo
8:18 am - 1:25 pm
IAD
-
STN
24h 07m
3 stops
Multiple Airlines Logo
4:25 pm - 3:10 pm
STN
-
IAD
27h 45m
2 stops
$851Multiple Airlines
Tue, Jun 2 - Wed, Jun 3

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to London Stansted 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 May 20, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London Stansted Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 8/15

8:30 pm-9:40 pm

2 stops20h 10m

London Stansted

Mon 9/14

8:10 am-3:10 pm

2 stops36h 00m

$842

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Fri 6/5

4:05 pm-11:05 pm

2 stops26h 00m

London Stansted

Mon 6/8

6:30 am-8:40 pm

3 stops19h 10m

$843

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Tue 6/16

8:18 am-10:40 pm

3 stops33h 22m

London Stansted

Sat 6/20

6:35 am-7:44 am

3 stops30h 09m

$844

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Tue 8/4

9:55 am-9:00 pm

2 stops30h 05m

London Stansted

Wed 8/19

9:30 pm-1:35 pm

2 stops21h 05m

$845

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 9/30

9:00 pm-6:20 am

1 stop28h 20m

London Stansted

Fri 10/9

7:25 am-7:00 pm

1 stop16h 35m

$846

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 9/30

9:00 pm-6:20 am

1 stop28h 20m

London Stansted

Sun 10/4

7:25 am-7:00 pm

1 stop16h 35m

$847
Quickest round-trip

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Thu 10/1

8:30 pm-10:55 pm

2 stops21h 25m

London Stansted

Mon 10/5

8:10 am-7:00 pm

2 stops15h 50m

$848

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Tue 6/9

5:15 pm-10:40 pm

2 stops24h 25m

London Stansted

Sat 6/13

3:05 pm-3:10 pm

2 stops29h 05m

$849

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Tue 6/16

8:18 am-10:40 pm

3 stops33h 22m

London Stansted

Tue 6/23

10:00 pm-7:01 pm

3 stops26h 01m

$850

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Tue 6/2

8:18 am-1:25 pm

3 stops24h 07m

London Stansted

Wed 6/3

4:25 pm-3:10 pm

2 stops27h 45m

$851

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 London from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to London Stansted 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 airline that flies from Washington, D.C. Dulles Intl to London Stansted?

Royal Air Maroc and Turkish Airlines are the most popular carriers operating from Washington, D.C. Dulles Intl to London Stansted

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

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

Cheap Washington, D.C. Dulles Intl Airport to London Stansted Airport (IAD to STN) flight deals and tips

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

Fastest flight time

14h 35m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to London Stansted Airport takes 14h 35m
There are no direct flights from Washington, D.C. Dulles Intl Airport to London Stansted Airport. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to London Stansted Airport.
Search flight deals

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to London Stansted Airport

  • How far is Washington, D.C. Dulles Intl to London Stansted by plane?

    The distance between Washington, D.C. Dulles Intl and London Stansted is about 3683.3 mi. Typically, this will take 14h 35m by plane in normal conditions.

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

    Prices for flights from Washington, D.C. Dulles Intl Airport to London Stansted Airport are updated daily.

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

  • What documentation or ID do you need to fly to London Stansted Airport?

    The required travel and health documents for your London Stansted Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Stansted Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Milton Keynes
Dover
Luton
Hayes
Crawley
Wembley
Slough
Croydon
Stansted
Watford
Harrow
Brentwood
Dartford
Ilford
Cobham
Folkestone
Uxbridge
Romford

Why use momondo?

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

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 London from Washington, D.C..

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

All flight searches from Washington, D.C. to London on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Washington, D.C. to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

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

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