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Cheap flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport from £428

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 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
STN — IAD
10 Jan — 17 Jan1
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 11 December 2025.

Thu 18/1216:05STN - IAD
2 stops33h 55mMultiple Airlines
Tue 6/119:40IAD - STN
2 stops19h 55mMultiple Airlines
Deal found 11/12£630
Thu 11/1206:30STN - IAD
1 stop14h 05mMultiple Airlines
Thu 18/1221:00IAD - STN
1 stop14h 35mMultiple Airlines
Deal found 9/12£639
Tue 16/1208:30STN - IAD
2 stops15h 00mMultiple Airlines
Tue 23/1219:40IAD - STN
2 stops13h 40mMultiple Airlines
Deal found 9/12£650
Fri 12/1213:30STN - IAD
1 stop11h 00mMultiple Airlines
Sun 14/1221:00IAD - STN
1 stop14h 35mMultiple Airlines
Deal found 10/12£662
Wed 24/1207:35STN - IAD
2 stops15h 55mMultiple Airlines
Sat 10/119:40IAD - STN
2 stops13h 55mMultiple Airlines
Deal found 9/12£667
Fri 19/1205:55STN - IAD
2 stops20h 05mMultiple Airlines
Mon 5/119:40IAD - STN
2 stops19h 55mMultiple Airlines
Deal found 10/12£668
Fri 26/1217:05STN - IAD
2 stops27h 10mMultiple Airlines
Tue 13/117:30IAD - STN
2 stops25h 20mMultiple Airlines
Deal found 9/12£668
Tue 23/1206:00STN - IAD
1 stop14h 35mMultiple Airlines
Tue 30/1217:05IAD - STN
1 stop10h 15mMultiple Airlines
Deal found 10/12£678
Wed 24/1207:20STN - IAD
1 stop16h 25mRoyal Air Maroc
Sat 10/120:45IAD - STN
1 stop28h 35mRoyal Air Maroc
Deal found 9/12£686
Wed 24/1207:40STN - IAD
2 stops18h 20mMultiple Airlines
Tue 6/119:40IAD - STN
2 stops19h 55mMultiple Airlines
Deal found 10/12£698

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 11 December 2025.

Round-trip from

£468

One-way from

£428

Popular in

July

Cheapest in

February

Average price

£596
12/2-16/2
  • 12/2-16/2
  • 4 total stops
  • 60h 50m total
  • London to Washington, D.C.
Search Deals
1/3
  • 1/3
  • 1 total stop
  • 14h 05m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 11 December 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

Stansted

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 12/1

08:30-15:35

1 stop12h 05m

Washington, D.C. Dulles Intl

Thu 15/1

17:05-13:20

1 stop15h 15m

£471

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 23/1

06:30-15:35

1 stop14h 05m

Washington, D.C. Dulles Intl

Fri 30/1

17:05-14:50

1 stop16h 45m

£474

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 18/2

06:30-18:45

2 stops17h 15m

Washington, D.C. Dulles Intl

Sun 22/2

20:45-00:50

2 stops23h 05m

£480

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sun 1/2

08:30-18:30

2 stops15h 00m

Washington, D.C. Dulles Intl

Sun 8/2

19:40-18:20

2 stops17h 40m

£482

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 28/1

05:55-21:00

2 stops20h 05m

Washington, D.C. Dulles Intl

Fri 30/1

22:30-20:35

2 stops17h 05m

£521

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 14/2

08:30-15:35

1 stop12h 05m

Washington, D.C. Dulles Intl

Sat 21/2

17:05-07:50

1 stop9h 45m

£521

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 11/3

07:40-19:45

2 stops16h 05m

Washington, D.C. Dulles Intl

Wed 18/3

21:45-20:55

2 stops19h 10m

£534

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 24/1

18:35-21:00

2 stops31h 25m

Washington, D.C. Dulles Intl

Fri 13/2

22:30-20:35

2 stops17h 05m

£536

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 11/3

05:55-22:00

2 stops20h 05m

Washington, D.C. Dulles Intl

Sun 15/3

18:05-07:50

1 stop9h 45m

£538

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 31/1

07:15-18:50

1 stop16h 35m

Washington, D.C. Dulles Intl

Sat 7/2

20:30-13:05

1 stop11h 35m

£541

Flights are sorted by cheapest return flights first.

Deals found on 9/12

Showing 1-10 of 21 results
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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.

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.

  • 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.

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
Woodbridge
Arlington
Alexandria
College Park

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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?

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