Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

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 1/31. 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

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 - 3:45 pmIAD-STN
14h 15m1 stop
Multiple Airlines Logo
7:35 am - 5:15 pmSTN-IAD
14h 40m1 stop
$579Multiple Airlines
Find Deal
Mon, Feb 16 - Mon, Feb 23
Multiple Airlines Logo
7:40 pm - 8:55 pmIAD-STN
20h 15m2 stops
Multiple Airlines Logo
5:55 am - 6:30 pmSTN-IAD
17h 35m2 stops
$580Multiple Airlines
Find Deal
Sun, Jan 18 - Sun, Jan 25
Multiple Airlines Logo
8:30 pm - 3:45 pmIAD-STN
14h 15m1 stop
Multiple Airlines Logo
7:15 am - 6:50 pmSTN-IAD
16h 35m1 stop
$581Multiple Airlines
Find Deal
Mon, Feb 16 - Sat, Feb 28
Multiple Airlines Logo
5:05 pm - 7:50 amIAD-STN
9h 45m1 stop
Multiple Airlines Logo
6:30 am - 3:35 pmSTN-IAD
14h 05m1 stop
$582Multiple Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
Multiple Airlines Logo
7:40 pm - 6:20 pmIAD-STN
17h 40m2 stops
Multiple Airlines Logo
6:30 am - 6:30 pmSTN-IAD
17h 00m2 stops
$583Multiple Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 12
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
$584Multiple Airlines
Find Deal
Sat, Jan 17 - Sat, Jan 24
Multiple Airlines Logo
7:40 pm - 11:05 pmBWI-STN
22h 25m2 stops
Multiple Airlines Logo
5:55 am - 6:40 pmSTN-BWI
17h 45m2 stops
$584Multiple Airlines
Find Deal
Fri, Feb 20 - Tue, Feb 24
Multiple Airlines Logo
8:30 pm - 11:10 pmIAD-STN
21h 40m1 stop
Multiple Airlines Logo
8:45 am - 5:15 pmSTN-IAD
13h 30m1 stop
$585Multiple Airlines
Find Deal
Sat, Feb 14 - Thu, Feb 19
Multiple Airlines Logo
7:40 pm - 5:35 pmBWI-STN
16h 55m2 stops
Multiple Airlines Logo
5:55 am - 6:40 pmSTN-BWI
17h 45m2 stops
$585Multiple Airlines
Find Deal
Sun, Nov 30 - Fri, Dec 5
Multiple Airlines Logo
4:30 pm - 9:25 pmIAD-STN
24h 55m3 stops
Multiple Airlines Logo
8:15 am - 9:05 pmSTN-IAD
16h 50m2 stops
$586Multiple Airlines
Find Deal
Mon, Mar 9 - Fri, Mar 13

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 November 20, 2025.
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

Mon 2/16

8:30 pm-3:45 pm

1 stop14h 15m

London Stansted

Mon 2/23

7:35 am-5:15 pm

1 stop14h 40m

$579

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sun 1/18

7:40 pm-8:55 pm

2 stops20h 15m

London Stansted

Sun 1/25

5:55 am-6:30 pm

2 stops17h 35m

$580

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 2/16

8:30 pm-3:45 pm

1 stop14h 15m

London Stansted

Sat 2/28

7:15 am-6:50 pm

1 stop16h 35m

$581

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Wed 12/3

5:05 pm-7:50 am

1 stop9h 45m

London Stansted

Wed 12/10

6:30 am-3:35 pm

1 stop14h 05m

$582

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 12/8

7:40 pm-6:20 pm

2 stops17h 40m

London Stansted

Fri 12/12

6:30 am-6:30 pm

2 stops17h 00m

$583

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 1/17

8:30 pm-1:05 pm

1 stop11h 35m

London Stansted

Sat 1/24

11:00 am-6:50 pm

1 stop12h 50m

$584

BaltimoreLondon

BWI - STN

BWISTN

Baltimore/Washington

Fri 2/20

7:40 pm-11:05 pm

2 stops22h 25m

London Stansted

Tue 2/24

5:55 am-6:40 pm

2 stops17h 45m

$584

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sat 2/14

8:30 pm-11:10 pm

1 stop21h 40m

London Stansted

Thu 2/19

8:45 am-5:15 pm

1 stop13h 30m

$585

BaltimoreLondon

BWI - STN

BWISTN

Baltimore/Washington

Sun 11/30

7:40 pm-5:35 pm

2 stops16h 55m

London Stansted

Fri 12/5

5:55 am-6:40 pm

2 stops17h 45m

$585

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Mon 3/9

4:30 pm-9:25 pm

3 stops24h 55m

London Stansted

Fri 3/13

8:15 am-9:05 pm

2 stops16h 50m

$586

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

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. 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. 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. 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

Direct flights

None
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 9h 45m.

  • 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 $369Free 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
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?

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 12/20
Sat 12/27
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to London Heathrow Airportfrom $366
Flights to London Gatwick Airportfrom $311
Flights to London City Airportfrom $488
Flights to London Luton Airportfrom $363
Flights to Glasgow Intl Airportfrom $394
Flights to London Southend Airportfrom $482
Flights to Belfast Intl Airportfrom $510
Flights to Belfast City Airportfrom $510