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Cheap flights from Washington, D.C. to London from $250

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. to London departing on 9/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington, D.C. to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:40 pm - 10:20 pmIAD  Washington, D.C. Dulles Intl-STN London Stansted
21h 40m2 stops Reykjavik Keflavik Intl Helsinki-Vantaa
Multiple Airlines Logo
5:55 am - 6:30 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
17h 35m2 stops Helsinki-Vantaa Reykjavik Keflavik Intl
$628Multiple Airlines
Fri, Nov 13 - Fri, Nov 20
Multiple Airlines Logo
7:40 pm - 11:15 pmIAD  Washington, D.C. Dulles Intl-STN London Stansted
22h 35m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen
Multiple Airlines Logo
8:15 am - 6:30 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
15h 15m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl
$629Multiple Airlines
Fri, Nov 13 - Tue, Nov 17
Multiple Airlines Logo
7:40 pm - 8:00 pmIAD  Washington, D.C. Dulles Intl-STN London Stansted
19h 20m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen
Multiple Airlines Logo
8:15 am - 6:30 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
15h 15m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl
$632Multiple Airlines
Fri, Nov 6 - Sun, Nov 15
Multiple Airlines Logo
10:35 pm - 9:00 pmIAD  Washington, D.C. Dulles Intl-STN London Stansted
17h 25m2 stops Lisbon Humberto Delgado Madrid Barajas
Multiple Airlines Logo
9:10 am - 3:10 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
35h 00m2 stops Madrid Barajas Lisbon Humberto Delgado
$632Multiple Airlines
Tue, Oct 6 - Tue, Oct 20
Multiple Airlines Logo
5:40 pm - 1:40 pmIAD  Washington, D.C. Dulles Intl-STN London Stansted
15h 00m2 stops Lisbon Humberto Delgado Madrid Barajas
Multiple Airlines Logo
9:10 am - 3:10 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
35h 00m2 stops Madrid Barajas Lisbon Humberto Delgado
$632Multiple Airlines
Sun, Sep 27 - Tue, Oct 13
Multiple Airlines Logo
8:20 pm - 7:35 pmIAD  Washington, D.C. Dulles Intl-STN London Stansted
18h 15m2 stops Kastrup Copenhagen Helsinki-Vantaa
Multiple Airlines Logo
12:05 pm - 5:00 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
33h 55m3 stops Helsinki-Vantaa Stockholm Arlanda Kastrup Copenhagen
$634Multiple Airlines
Thu, Sep 24 - Wed, Sep 30
Multiple Airlines Logo
8:20 pm - 12:50 amIAD  Washington, D.C. Dulles Intl-STN London Stansted
23h 30m2 stops Kastrup Copenhagen Helsinki-Vantaa
Multiple Airlines Logo
6:35 pm - 5:00 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
27h 25m2 stops Helsinki-Vantaa Kastrup Copenhagen
$637Multiple Airlines
Mon, Sep 21 - Tue, Sep 29
Multiple Airlines Logo
7:40 pm - 11:15 pmIAD  Washington, D.C. Dulles Intl-STN London Stansted
22h 35m2 stops Reykjavik Keflavik Intl Helsinki-Vantaa
Multiple Airlines Logo
7:55 am - 6:30 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
15h 35m2 stops Helsinki-Vantaa Reykjavik Keflavik Intl
$637Multiple Airlines
Wed, Nov 18 - Thu, Nov 26
Multiple Airlines Logo
10:35 pm - 9:00 pmIAD  Washington, D.C. Dulles Intl-STN London Stansted
17h 25m2 stops Lisbon Humberto Delgado Madrid Barajas
Multiple Airlines Logo
9:10 am - 3:10 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
35h 00m2 stops Madrid Barajas Lisbon Humberto Delgado
$637Multiple Airlines
Tue, Oct 6 - Tue, Oct 20
Multiple Airlines Logo
8:20 pm - 12:50 amIAD  Washington, D.C. Dulles Intl-STN London Stansted
23h 30m2 stops Kastrup Copenhagen Helsinki-Vantaa
Multiple Airlines Logo
6:35 pm - 5:00 pmSTN  London Stansted-IAD Washington, D.C. Dulles Intl
27h 25m2 stops Helsinki-Vantaa Kastrup Copenhagen
$639Multiple Airlines
Mon, Sep 21 - Tue, Sep 29

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Customize your flight search to find flights from Washington, D.C. 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 August 16, 2026.
Use the filters below to find and compare flights from Washington, D.C. 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 Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Fri 11/13

7:40 pm-10:20 pm

2 stops21h 40m

London Stansted

Fri 11/20

5:55 am-6:30 pm

2 stops17h 35m

$628

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Fri 11/13

7:40 pm-11:15 pm

2 stops22h 35m

London Stansted

Tue 11/17

8:15 am-6:30 pm

2 stops15h 15m

$629
Quickest round-trip

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Fri 11/6

7:40 pm-8:00 pm

2 stops19h 20m

London Stansted

Sun 11/15

8:15 am-6:30 pm

2 stops15h 15m

$632

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Tue 10/6

10:35 pm-9:00 pm

2 stops17h 25m

London Stansted

Tue 10/20

9:10 am-3:10 pm

2 stops35h 00m

$632

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Sun 9/27

5:40 pm-1:40 pm

2 stops15h 00m

London Stansted

Tue 10/13

9:10 am-3:10 pm

2 stops35h 00m

$632

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Thu 9/24

8:20 pm-7:35 pm

2 stops18h 15m

London Stansted

Wed 9/30

12:05 pm-5:00 pm

3 stops33h 55m

$634

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Mon 9/21

8:20 pm-12:50 am

2 stops23h 30m

London Stansted

Tue 9/29

6:35 pm-5:00 pm

2 stops27h 25m

$637

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Wed 11/18

7:40 pm-11:15 pm

2 stops22h 35m

London Stansted

Thu 11/26

7:55 am-6:30 pm

2 stops15h 35m

$637

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Tue 10/6

10:35 pm-9:00 pm

2 stops17h 25m

London Stansted

Tue 10/20

9:10 am-3:10 pm

2 stops35h 00m

$637

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - STN London Stansted

IADSTN

Washington, D.C. Dulles Intl

Mon 9/21

8:20 pm-12:50 am

2 stops23h 30m

London Stansted

Tue 9/29

6:35 pm-5:00 pm

2 stops27h 25m

$639

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. 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. to London Stansted?

Lufthansa is the most popular carrier operating from Washington, D.C. to London Stansted

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

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

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

Fastest flight time

11h 35m

Direct flights

None
The fastest flight from Washington, D.C. to London Stansted Airport takes 11h 35m
There are no direct flights from Washington, D.C. to London Stansted Airport. There are no popular flight routes from Washington, D.C. to London Stansted Airport.
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Frequently asked questions about flying from Washington, D.C. to London Stansted Airport

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

    A flight from Washington, D.C. to London Stansted will travel around 3668.5 mi. In terms of flight time, this usually takes a little over 11h 35m.

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

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

  • How old do you have to be to fly from Washington, D.C. to London Stansted 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 Washington, D.C. 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
Luton
Hayes
Wembley
Croydon
Dover
Stansted
Richmond
Kingston upon Thames
Harrow
Watford
Cobham
Slough
Uxbridge
Worthing
Romford
Ilford
Bedford

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to London. momondo saves you time and could save you money on your trip.

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

Yes. All flights to London from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

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?

Of course. momondo tracks the price of Washington, D.C. to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your London Stansted Airport trip

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