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Cheap flights from London Stansted Airport to Washington, D.C. from $499

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Stansted Airport to Washington, D.C. departing on 6/13. 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 London Stansted Airport to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 am - 6:30 pm
STN
-
IAD
15h 00m
2 stops
Multiple Airlines Logo
8:40 pm - 4:35 pm
IAD
-
STN
15h 55m
2 stops
$547Multiple Airlines
Sat, Feb 28 - Sun, Mar 8
Multiple Airlines Logo
8:30 am - 6:30 pm
STN
-
IAD
15h 00m
2 stops
Multiple Airlines Logo
7:40 pm - 6:20 pm
IAD
-
STN
17h 40m
2 stops
$573Multiple Airlines
Thu, Feb 12 - Sun, Feb 15
Multiple Airlines Logo
6:30 am - 8:26 pm
STN
-
IAD
18h 56m
2 stops
Multiple Airlines Logo
6:30 pm - 11:55 pm
IAD
-
STN
25h 25m
2 stops
$577Multiple Airlines
Thu, Mar 5 - Mon, Mar 16
Multiple Airlines Logo
8:30 am - 6:30 pm
STN
-
IAD
15h 00m
2 stops
Multiple Airlines Logo
7:40 pm - 2:20 pm
IAD
-
STN
13h 40m
2 stops
$579Multiple Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
8:25 pm - 10:00 pm
STN
-
IAD
29h 35m
2 stops
Multiple Airlines Logo
8:40 pm - 10:55 pm
IAD
-
STN
22h 15m
2 stops
$616Multiple Airlines
Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
8:25 pm - 10:00 pm
STN
-
IAD
29h 35m
2 stops
Multiple Airlines Logo
8:40 pm - 10:55 pm
IAD
-
STN
22h 15m
2 stops
$621Multiple Airlines
Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
8:25 pm - 10:00 pm
STN
-
IAD
29h 35m
2 stops
Multiple Airlines Logo
8:40 pm - 10:55 pm
IAD
-
STN
22h 15m
2 stops
$624Multiple Airlines
Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
3:15 pm - 5:55 pm
STN
-
IAD
30h 40m
3 stops
Multiple Airlines Logo
8:20 pm - 9:20 pm
IAD
-
STN
20h 00m
2 stops
$632Multiple Airlines
Sat, Mar 28 - Thu, Apr 9
Multiple Airlines Logo
12:00 pm - 3:35 pm
STN
-
IAD
31h 35m
2 stops
Multiple Airlines Logo
6:30 pm - 4:55 pm
IAD
-
STN
18h 25m
2 stops
$639Multiple Airlines
Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
4:30 pm - 4:50 pm
STN
-
IAD
29h 20m
3 stops
Multiple Airlines Logo
8:20 pm - 11:20 pm
IAD
-
STN
22h 00m
2 stops
$650Multiple Airlines
Wed, Apr 1 - Mon, Apr 6

Royal Air Maroc flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport

Our best Royal Air Maroc deals on London Stansted Airport to Washington, D.C. Dulles Intl Airport flight tickets
Royal Air Maroc
Jun 26
STN7:25 amLondon Stansted
16h 35m
1 stop
IAD7:00 pmWashington, D.C. Dulles Intl
Jul 11
IAD9:00 pmWashington, D.C. Dulles Intl
28h 20m
1 stop
STN6:20 amLondon Stansted
$726
Royal Air Maroc
Jun 27
STN7:25 amLondon Stansted
16h 35m
1 stop
IAD7:00 pmWashington, D.C. Dulles Intl
Jul 7
IAD9:00 pmWashington, D.C. Dulles Intl
28h 20m
1 stop
STN6:20 amLondon Stansted
$763

momondo Fare Finder

 
Customize your flight search to find flights from London Stansted Airport to Washington, D.C. Dulles Intl 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 1, 2026.
Use the filters below to find and compare flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 2/28

8:30 am-6:30 pm

2 stops15h 00m

Washington, D.C. Dulles Intl

Sun 3/8

8:40 pm-4:35 pm

2 stops15h 55m

$547

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 2/12

8:30 am-6:30 pm

2 stops15h 00m

Washington, D.C. Dulles Intl

Sun 2/15

7:40 pm-6:20 pm

2 stops17h 40m

$573

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 3/5

6:30 am-8:26 pm

2 stops18h 56m

Washington, D.C. Dulles Intl

Mon 3/16

6:30 pm-11:55 pm

2 stops25h 25m

$577

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 2/26

8:30 am-6:30 pm

2 stops15h 00m

Washington, D.C. Dulles Intl

Mon 3/2

7:40 pm-2:20 pm

2 stops13h 40m

$579

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 3/17

8:25 pm-10:00 pm

2 stops29h 35m

Washington, D.C. Dulles Intl

Tue 3/24

8:40 pm-10:55 pm

2 stops22h 15m

$616

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 3/17

8:25 pm-10:00 pm

2 stops29h 35m

Washington, D.C. Dulles Intl

Tue 3/24

8:40 pm-10:55 pm

2 stops22h 15m

$621

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 3/17

8:25 pm-10:00 pm

2 stops29h 35m

Washington, D.C. Dulles Intl

Tue 3/24

8:40 pm-10:55 pm

2 stops22h 15m

$624

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 3/28

3:15 pm-5:55 pm

3 stops30h 40m

Washington, D.C. Dulles Intl

Thu 4/9

8:20 pm-9:20 pm

2 stops20h 00m

$632

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 3/16

12:00 pm-3:35 pm

2 stops31h 35m

Washington, D.C. Dulles Intl

Mon 3/23

6:30 pm-4:55 pm

2 stops18h 25m

$639

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 4/1

4:30 pm-4:50 pm

3 stops29h 20m

Washington, D.C. Dulles Intl

Mon 4/6

8:20 pm-11:20 pm

2 stops22h 00m

$650

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Washington, D.C. from

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

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $747. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from London Stansted Airport to Washington, D.C. Dulles Intl Airport for around $882.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from London Stansted Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $820 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $849 on average. Flights to Washington, D.C. Dulles Intl Airport from London Stansted Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

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

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

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

Fastest flight time

15h 00m

Direct flights

None
The fastest flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport takes 15h 00m
There are no direct flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Stansted Airport to Washington, D.C. Dulles Intl Airport.
Search flight deals

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

    The distance between London Stansted and Washington, D.C. Dulles Intl is about 3683.3 mi. Flights usually cover this in 15h 00m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport were last updated today.

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

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Sterling
Fairfax
Linthicum Heights

Why use momondo?

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

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 Washington, D.C. from London.

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

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from London.

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

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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