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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $299

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 1/17. 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
5:30 pm - 11:55 pmIAD-STN
25h 25m2 stops
Multiple Airlines Logo
6:35 pm - 9:00 pmSTN-IAD
31h 25m2 stops
$574Multiple Airlines
Find Deal
Mon, Dec 1 - Sat, Dec 6
Multiple Airlines Logo
5:05 pm - 7:50 amIAD-STN
9h 45m1 stop
Multiple Airlines Logo
6:30 am - 7:30 pmSTN-IAD
18h 00m1 stop
$575Multiple Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 17
Multiple Airlines Logo
9:45 am - 10:40 pmIAD-STN
31h 55m2 stops
Multiple Airlines Logo
11:35 am - 4:40 pmSTN-IAD
34h 05m2 stops
$577Multiple Airlines
Find Deal
Mon, Dec 1 - Mon, Dec 15
Multiple Airlines Logo
7:40 pm - 11:10 pmIAD-STN
22h 30m2 stops
Multiple Airlines Logo
8:45 am - 6:30 pmSTN-IAD
14h 45m2 stops
$579Multiple Airlines
Find Deal
Sat, Feb 14 - Thu, Feb 19
Multiple Airlines Logo
8:30 pm - 8:20 pmIAD-STN
18h 50m1 stop
Multiple Airlines Logo
7:35 am - 5:15 pmSTN-IAD
14h 40m1 stop
$580Multiple Airlines
Find Deal
Sat, Feb 14 - Mon, Feb 23
Multiple Airlines Logo
7:40 pm - 3:25 pmIAD-STN
14h 45m2 stops
Multiple Airlines Logo
7:15 am - 6:30 pmSTN-IAD
16h 15m2 stops
$582Multiple Airlines
Find Deal
Sat, Jan 10 - Sat, Jan 17
Multiple Airlines Logo
8:30 pm - 1:05 pmIAD-STN
11h 35m1 stop
Multiple Airlines Logo
11:00 am - 6:50 pmSTN-IAD
12h 50m1 stop
$583Multiple Airlines
Find Deal
Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
5:05 pm - 7:50 amIAD-STN
9h 45m1 stop
Multiple Airlines Logo
6:30 am - 7:30 pmSTN-IAD
18h 00m1 stop
$585Multiple Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 12
Multiple Airlines Logo
7:40 pm - 2:50 pmIAD-STN
14h 10m2 stops
Multiple Airlines Logo
6:30 am - 6:30 pmSTN-IAD
17h 00m2 stops
$586Multiple Airlines
Find Deal
Sun, Dec 7 - Thu, Dec 11
Multiple Airlines Logo
9:45 am - 9:50 amIAD-STN
19h 05m3 stops
Multiple Airlines Logo
7:55 pm - 3:50 pmSTN-IAD
24h 55m2 stops
$587Multiple Airlines
Find Deal
Tue, Dec 2 - Mon, Dec 8

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 November 16, 2025.
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

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 12/1

5:30 pm-11:55 pm

2 stops25h 25m

London Stansted

Sat 12/6

6:35 pm-9:00 pm

2 stops31h 25m

$574

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 12/10

5:05 pm-7:50 am

1 stop9h 45m

London Stansted

Wed 12/17

6:30 am-7:30 pm

1 stop18h 00m

$575

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 12/1

9:45 am-10:40 pm

2 stops31h 55m

London Stansted

Mon 12/15

11:35 am-4:40 pm

2 stops34h 05m

$577

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 2/14

7:40 pm-11:10 pm

2 stops22h 30m

London Stansted

Thu 2/19

8:45 am-6:30 pm

2 stops14h 45m

$579

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 2/14

8:30 pm-8:20 pm

1 stop18h 50m

London Stansted

Mon 2/23

7:35 am-5:15 pm

1 stop14h 40m

$580

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 1/10

7:40 pm-3:25 pm

2 stops14h 45m

London Stansted

Sat 1/17

7:15 am-6:30 pm

2 stops16h 15m

$582

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 1/31

8:30 pm-1:05 pm

1 stop11h 35m

London Stansted

Sat 2/7

11:00 am-6:50 pm

1 stop12h 50m

$583

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 12/8

5:05 pm-7:50 am

1 stop9h 45m

London Stansted

Fri 12/12

6:30 am-7:30 pm

1 stop18h 00m

$585

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sun 12/7

7:40 pm-2:50 pm

2 stops14h 10m

London Stansted

Thu 12/11

6:30 am-6:30 pm

2 stops17h 00m

$586

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Tue 12/2

9:45 am-9:50 am

3 stops19h 05m

London Stansted

Mon 12/8

7:55 pm-3:50 pm

2 stops24h 55m

$587

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 day to depart on your flight to London Stansted Airport?

The cheapest day to depart on your flight to London Stansted Airport is on a Tuesday when prices can be found for as low as $457. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Washington, D.C. Dulles Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $631.

What is the cheapest time of day to depart on your flight to London Stansted Airport?

Our most recent data shows that the best time of day to fly to London Stansted Airport is in the afternoon. Flights from Washington, D.C. Dulles Intl Airport to London Stansted Airport during this time can be as low as $509. In contrast, the most expensive time of day to depart to London Stansted Airport is in the evening when prices are around $513.

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

Direct flights

None
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.
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  • 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 9h 45m 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
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Brentwood
Chelmsford
Wembley
Folkestone
Romford
Ilford
Cobham
Stansted
Harrow
Watford

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.

An easier way to manage your London Stansted Airport trip

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