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Cheap flights from Washington, D.C. to London from $257

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 3/18. 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
0 bags

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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
8:30 pm - 3:25 pm
IAD
-
STN
13h 55m
2 stops
Multiple Airlines Logo
8:35 am - 7:20 pm
STN
-
IAD
15h 45m
2 stops
$536Multiple Airlines
Fri, Apr 17 - Sat, Apr 25
Multiple Airlines Logo
8:20 pm - 7:35 pm
IAD
-
STN
18h 15m
2 stops
Multiple Airlines Logo
12:15 pm - 4:50 pm
STN
-
IAD
33h 35m
3 stops
$539Multiple Airlines
Mon, Apr 13 - Wed, Apr 22
Multiple Airlines Logo
8:40 pm - 10:15 pm
IAD
-
STN
21h 35m
2 stops
Multiple Airlines Logo
4:10 pm - 7:30 pm
STN
-
IAD
31h 20m
2 stops
$540Multiple Airlines
Wed, Mar 18 - Tue, Mar 24
Multiple Airlines Logo
6:30 pm - 10:40 pm
IAD
-
STN
24h 10m
2 stops
Multiple Airlines Logo
11:35 am - 3:35 pm
STN
-
IAD
32h 00m
2 stops
$541Multiple Airlines
Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
8:20 pm - 12:10 am
IAD
-
STN
22h 50m
2 stops
Multiple Airlines Logo
12:15 pm - 4:50 pm
STN
-
IAD
33h 35m
3 stops
$544Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
Multiple Airlines Logo
10:20 pm - 12:20 am
IAD
-
STN
21h 00m
2 stops
Multiple Airlines Logo
8:50 pm - 4:05 pm
STN
-
IAD
24h 15m
2 stops
$545Multiple Airlines
Wed, Apr 22 - Mon, Apr 27
Multiple Airlines Logo
9:00 am - 10:35 pm
IAD
-
STN
32h 35m
3 stops
Multiple Airlines Logo
6:00 pm - 3:50 pm
STN
-
IAD
26h 50m
2 stops
$546Multiple Airlines
Sun, Mar 1 - Sat, Mar 7
Multiple Airlines Logo
8:40 pm - 3:45 pm
IAD
-
STN
15h 05m
2 stops
Multiple Airlines Logo
1:10 pm - 7:20 pm
STN
-
IAD
35h 10m
2 stops
$548Multiple Airlines
Mon, Mar 23 - Mon, Mar 30
Multiple Airlines Logo
8:30 pm - 7:35 pm
IAD
-
STN
18h 05m
2 stops
Multiple Airlines Logo
6:45 am - 7:20 pm
STN
-
IAD
17h 35m
2 stops
$549Multiple Airlines
Thu, May 7 - Mon, May 11
Multiple Airlines Logo
4:30 pm - 10:35 pm
IAD
-
STN
25h 05m
3 stops
Multiple Airlines Logo
6:00 pm - 3:50 pm
STN
-
IAD
26h 50m
2 stops
$550Multiple Airlines
Fri, Feb 27 - Sat, Mar 7

momondo Fare Finder

 
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 February 8, 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

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Fri 4/17

8:30 pm-3:25 pm

2 stops13h 55m

London Stansted

Sat 4/25

8:35 am-7:20 pm

2 stops15h 45m

$536

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 4/13

8:20 pm-7:35 pm

2 stops18h 15m

London Stansted

Wed 4/22

12:15 pm-4:50 pm

3 stops33h 35m

$539

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 3/18

8:40 pm-10:15 pm

2 stops21h 35m

London Stansted

Tue 3/24

4:10 pm-7:30 pm

2 stops31h 20m

$540

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 3/9

6:30 pm-10:40 pm

2 stops24h 10m

London Stansted

Mon 3/16

11:35 am-3:35 pm

2 stops32h 00m

$541

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 4/8

8:20 pm-12:10 am

2 stops22h 50m

London Stansted

Wed 4/15

12:15 pm-4:50 pm

3 stops33h 35m

$544

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 4/22

10:20 pm-12:20 am

2 stops21h 00m

London Stansted

Mon 4/27

8:50 pm-4:05 pm

2 stops24h 15m

$545

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sun 3/1

9:00 am-10:35 pm

3 stops32h 35m

London Stansted

Sat 3/7

6:00 pm-3:50 pm

2 stops26h 50m

$546

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 3/23

8:40 pm-3:45 pm

2 stops15h 05m

London Stansted

Mon 3/30

1:10 pm-7:20 pm

2 stops35h 10m

$548

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Thu 5/7

8:30 pm-7:35 pm

2 stops18h 05m

London Stansted

Mon 5/11

6:45 am-7:20 pm

2 stops17h 35m

$549

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Fri 2/27

4:30 pm-10:35 pm

3 stops25h 05m

London Stansted

Sat 3/7

6:00 pm-3:50 pm

2 stops26h 50m

$550

Flights are sorted by cheapest round-trip flights first.

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See travel insights to London from

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

How long does it take to fly to London Stansted Airport?

The flight from Washington, D.C. to London Stansted Airport depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Baltimore (a popular airport in Washington, D.C.) to London Heathrow Airport (the most popular airport in London Stansted Airport), then the flight time is 7h 05m on average. If you fly from Washington, D.C. (another popular airport in Washington, D.C.) to London Heathrow Airport, then the average flight time is 8h 05m.

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

12h 50m

Direct flights

None
The fastest flight from Washington, D.C. to London Stansted Airport takes 12h 50m
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.
Search flight deals

  • 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 12h 50m.

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

  • 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.

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

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

Compare and see reviews for airlines that fly from Washington, D.C. to London Stansted Airport with momondo
Airline
Rating
Free Cancellation
Price
PLAYPriceFrom $374Free CancellationRating
7.0
103 reviews
Search PLAY flights

Traveling to a place near London?

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

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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