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Cheap flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport from £414

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
STN — IAD
26 May — 2 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Stansted to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Stansted to Dulles Intl
Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 April 2026.

Tue 19/507:10
STN
-
IAD
2 stops17h 10m
Multiple Airlines
Tue 26/520:30
IAD
-
STN
2 stops22h 40m
Multiple Airlines
Deal found 21/4£430
Wed 20/520:00
STN
-
IAD
2 stops28h 20m
Multiple Airlines
Tue 26/520:30
IAD
-
STN
2 stops22h 40m
Multiple Airlines
Deal found 22/4£451
Wed 6/508:30
STN
-
IAD
2 stops15h 50m
Multiple Airlines
Sat 9/520:30
IAD
-
STN
2 stops21h 50m
Multiple Airlines
Deal found 21/4£471
Thu 14/517:35
STN
-
IAD
2 stops30h 45m
Multiple Airlines
Thu 28/520:30
IAD
-
STN
2 stops23h 00m
Multiple Airlines
Deal found 25/4£471
Thu 21/507:20
STN
-
IAD
2 stops17h 00m
Multiple Airlines
Thu 28/520:30
IAD
-
STN
2 stops23h 00m
Multiple Airlines
Deal found 21/4£474
Wed 29/406:30
STN
-
IAD
2 stops17h 50m
Multiple Airlines
Mon 4/520:30
IAD
-
STN
2 stops19h 50m
Multiple Airlines
Deal found 22/4£488
Thu 21/506:30
STN
-
IAD
2 stops17h 50m
Multiple Airlines
Mon 1/620:30
IAD
-
STN
2 stops15h 35m
Multiple Airlines
Deal found 24/4£493
Thu 7/508:30
STN
-
IAD
2 stops15h 50m
Multiple Airlines
Tue 12/520:30
IAD
-
STN
2 stops16h 05m
Multiple Airlines
Deal found 22/4£505

Find flight deals from Stansted to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Stansted (STN) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 26 April 2026.

Round-trip from

£430

One-way from

£414

Popular in

July

Cheapest in

February

Average price

£526
19/5-26/5
  • 19/5-26/5
  • 4 total stops
  • 39h 50m total
  • London to Washington, D.C.
Search Deals
2/7
  • 2/7
  • 2 total stops
  • 37h 45m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£45 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Stansted to Dulles Intl 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, Cheapflights users made 858,174 searches. Data last updated 26 April 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

Cheapest return flight

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 14/5

17:35-19:20

2 stops30h 45m

Washington, D.C. Dulles Intl

Thu 28/5

20:30-00:30

2 stops23h 00m

£471

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 7/10

17:45-11:35

1 stop22h 50m

Washington, D.C. Dulles Intl

Mon 12/10

13:20-16:40

1 stop22h 20m

£666

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 8/10

17:35-11:35

1 stop23h 00m

Washington, D.C. Dulles Intl

Tue 13/10

13:20-09:55

1 stop15h 35m

£669

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 4/6

06:30-20:29

3 stops18h 59m

Washington, D.C. Dulles Intl

Tue 7/7

16:20-13:25

2 stops16h 05m

£712
Fastest return journey

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 5/6

08:40-19:00

2 stops15h 20m

Washington, D.C. Dulles Intl

Tue 7/7

16:20-13:25

2 stops16h 05m

£742

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 12/9

10:50-11:35

1 stop29h 45m

Washington, D.C. Dulles Intl

Sun 20/9

21:45-16:40

1 stop37h 55m

£744

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 18/5

10:50-11:35

1 stop29h 45m

Washington, D.C. Dulles Intl

Thu 25/6

13:20-16:40

1 stop22h 20m

£798

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 7/9

10:50-11:35

1 stop29h 45m

Washington, D.C. Dulles Intl

Sun 20/9

13:20-09:55

1 stop15h 35m

£831

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 29/8

10:50-19:50

1 stop38h 00m

Washington, D.C. Dulles Intl

Thu 10/9

13:20-16:40

1 stop22h 20m

£865

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 21/8

06:40-11:35

1 stop33h 55m

Washington, D.C. Dulles Intl

Tue 15/9

13:20-16:50

1 stop22h 30m

£877

Flights are sorted by cheapest return flights first.

Deals found on 23/4

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Stansted to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Stansted with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport

How often are flights from London to Washington, D.C. delayed?

About 0% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 0 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Related info for your journey

Find useful and relevant information for your journey from Stansted to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

    Departing from London Stansted Airport to Washington, D.C. Dulles Intl Airport will take you 22h 50m. There are 3683 mi between London Stansted Airport and Washington, D.C. Dulles Intl Airport.

  • Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Stansted to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Stansted to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Dulles Intl.

  • Can I find deals for business class flights from Stansted to Dulles Intl?

    Yes. Cheapflights offers flight deals from Stansted to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Gaithersburg
Woodbridge
Arlington
Alexandria
Sterling

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How does Cheapflights help users find flights from Stansted to Dulles Intl?

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Why should you use Cheapflights to find cheap flight tickets from Stansted to Dulles Intl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dulles Intl from Stansted.

Can Cheapflights find flights from Stansted to Dulles Intl with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Stansted to Dulles Intl flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Stansted to Dulles Intl become cheaper?

Of course! You can now track prices for flights from Stansted to Dulles Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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