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Cheap flights from London Stansted Airport to Washington, D.C. from $576

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 3/15. 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
8:40 pm - 4:30 pm
STN
-
IAD
24h 50m1 stop
Multiple Airlines Logo
5:30 pm - 11:55 pm
IAD
-
STN
25h 25m2 stops
$625Multiple Airlines
Wed, Feb 25 - Mon, Mar 2
Multiple Airlines Logo
8:30 am - 3:35 pm
STN
-
IAD
12h 05m1 stop
Multiple Airlines Logo
9:00 pm - 2:20 pm
IAD
-
STN
12h 20m1 stop
$629Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
9:20 pm - 6:30 pm
STN
-
IAD
26h 10m2 stops
Multiple Airlines Logo
7:40 pm - 8:35 pm
IAD
-
STN
19h 55m2 stops
$630Multiple Airlines
Thu, Jan 22 - Fri, Jan 30
Multiple Airlines Logo
9:25 am - 2:40 pm
STN
-
IAD
34h 15m2 stops
Multiple Airlines Logo
6:00 pm - 6:25 pm
IAD
-
STN
19h 25m2 stops
$636Multiple Airlines
Thu, Jan 15 - Wed, Jan 28
Multiple Airlines Logo
6:35 pm - 9:00 pm
STN
-
IAD
31h 25m2 stops
Multiple Airlines Logo
5:30 pm - 8:00 pm
IAD
-
STN
21h 30m2 stops
$637Multiple Airlines
Sat, Feb 7 - Sat, Feb 14
Multiple Airlines Logo
2:35 pm - 9:00 pm
STN
-
IAD
35h 25m2 stops
Multiple Airlines Logo
5:30 pm - 5:50 pm
IAD
-
STN
19h 20m2 stops
$642Multiple Airlines
Thu, Jan 15 - Thu, Feb 5
Multiple Airlines Logo
6:35 pm - 9:00 pm
STN
-
IAD
31h 25m2 stops
Multiple Airlines Logo
5:30 pm - 11:50 pm
IAD
-
STN
25h 20m3 stops
$643Multiple Airlines
Sat, Feb 7 - Sat, Feb 14
Multiple Airlines Logo
8:40 pm - 3:15 pm
STN
-
IAD
23h 35m2 stops
Multiple Airlines Logo
5:30 pm - 8:00 pm
IAD
-
STN
21h 30m2 stops
$653Multiple Airlines
Wed, Feb 4 - Sat, Feb 7
Multiple Airlines Logo
4:20 pm - 4:05 pm
STN
-
IAD
28h 45m2 stops
Multiple Airlines Logo
6:50 pm - 11:35 pm
IAD
-
STN
23h 45m2 stops
$655Multiple Airlines
Fri, Jan 16 - Sat, Jan 24
Multiple Airlines Logo
2:35 pm - 9:00 pm
STN
-
IAD
35h 25m2 stops
Multiple Airlines Logo
5:30 pm - 11:25 pm
IAD
-
STN
24h 55m3 stops
$660Multiple Airlines
Thu, Jan 15 - Thu, Feb 5

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
Dec 27
STN7:20 amLondon Stansted
16h 25m
1 stop
IAD6:45 pmWashington, D.C. Dulles Intl
Apr 8
IAD9:00 pmWashington, D.C. Dulles Intl
28h 20m
1 stop
STN6:20 amLondon Stansted
$759
Find similar
Royal Air Maroc
Dec 29
STN7:20 amLondon Stansted
16h 25m
1 stop
IAD6:45 pmWashington, D.C. Dulles Intl
Jan 11
IAD8:45 pmWashington, D.C. Dulles Intl
28h 35m
1 stop
STN6:20 amLondon Stansted
$875
Find similar
Royal Air Maroc
Dec 28
STN7:20 amLondon Stansted
16h 25m
1 stop
IAD6:45 pmWashington, D.C. Dulles Intl
Jan 10
IAD8:45 pmWashington, D.C. Dulles Intl
28h 35m
1 stop
STN6:20 amLondon Stansted
$923
Find similar

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 December 16, 2025.
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

Wed 2/25

8:40 pm-4:30 pm

1 stop24h 50m

Washington, D.C. Dulles Intl

Mon 3/2

5:30 pm-11:55 pm

2 stops25h 25m

$625

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 2/24

8:30 am-3:35 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Tue 3/3

9:00 pm-2:20 pm

1 stop12h 20m

$629

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 1/22

9:20 pm-6:30 pm

2 stops26h 10m

Washington, D.C. Dulles Intl

Fri 1/30

7:40 pm-8:35 pm

2 stops19h 55m

$630

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 1/15

9:25 am-2:40 pm

2 stops34h 15m

Washington, D.C. Dulles Intl

Wed 1/28

6:00 pm-6:25 pm

2 stops19h 25m

$636

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 2/7

6:35 pm-9:00 pm

2 stops31h 25m

Washington, D.C. Dulles Intl

Sat 2/14

5:30 pm-8:00 pm

2 stops21h 30m

$637

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 1/15

2:35 pm-9:00 pm

2 stops35h 25m

Washington, D.C. Dulles Intl

Thu 2/5

5:30 pm-5:50 pm

2 stops19h 20m

$642

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 2/7

6:35 pm-9:00 pm

2 stops31h 25m

Washington, D.C. Dulles Intl

Sat 2/14

5:30 pm-11:50 pm

3 stops25h 20m

$643

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 2/4

8:40 pm-3:15 pm

2 stops23h 35m

Washington, D.C. Dulles Intl

Sat 2/7

5:30 pm-8:00 pm

2 stops21h 30m

$653

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 1/16

4:20 pm-4:05 pm

2 stops28h 45m

Washington, D.C. Dulles Intl

Sat 1/24

6:50 pm-11:35 pm

2 stops23h 45m

$655

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 1/15

2:35 pm-9:00 pm

2 stops35h 25m

Washington, D.C. Dulles Intl

Thu 2/5

5:30 pm-11:25 pm

3 stops24h 55m

$660

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 $752. 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 $911.

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 evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $852 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

14h 05m

Direct flights

None
The fastest flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport takes 14h 05m
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 14h 05m, 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
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Harpers Ferry
Rockville
Gaithersburg
Reston
Manassas
Sterling
Fairfax

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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