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Dulles Intl

$489+ Cheap flights from Stansted (STN) to Dulles Intl (IAD)

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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
STN — IAD
Mar 21 — Mar 281
Sat 3/21
Sat 3/28
1 adult, Economy
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Cheap flight deals from Stansted to Dulles Intl

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 February 19, 2026.

This Mytrip deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:45 pm
STN
-
IAD
3 stops27h 33m
Multiple Airlines
Mon 4/278:30 pm
IAD
-
STN
2 stops17h 20m
Multiple Airlines
Deal found 2/18$545
This Mytrip deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:00 pm
STN
-
IAD
2 stops24h 00m
Multiple Airlines
Sat 4/258:20 pm
IAD
-
STN
2 stops22h 00m
Multiple Airlines
Deal found 2/17$546
This Mytrip deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/92:45 pm
STN
-
IAD
2 stops29h 25m
Multiple Airlines
Mon 4/138:30 pm
IAD
-
STN
2 stops22h 50m
Multiple Airlines
Deal found 2/17$567
This Mytrip deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2010:45 pm
STN
-
IAD
3 stops27h 33m
Multiple Airlines
Thu 4/238:30 pm
IAD
-
STN
2 stops21h 25m
Multiple Airlines
Deal found 2/18$572
This Mytrip deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/45:55 am
STN
-
IAD
2 stops20h 05m
Multiple Airlines
Tue 3/176:30 pm
IAD
-
STN
2 stops25h 20m
Multiple Airlines
Deal found 2/18$584
This Mytrip deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:10 am
STN
-
IAD
2 stops36h 00m
Multiple Airlines
Fri 5/88:30 pm
IAD
-
STN
2 stops23h 20m
Multiple Airlines
Deal found 2/17$595
This Booking.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/14:30 pm
STN
-
IAD
2 stops29h 20m
Multiple Airlines
Wed 4/88:20 pm
IAD
-
STN
2 stops22h 00m
Multiple Airlines
Deal found 2/15$597
This Mytrip deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:55 pm
STN
-
IAD
2 stops29h 15m
Multiple Airlines
Sat 5/28:30 pm
IAD
-
STN
2 stops22h 35m
Multiple Airlines
Deal found 2/18$603
This Mytrip deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/109:20 pm
STN
-
IAD
2 stops28h 40m
Multiple Airlines
Mon 3/166:30 pm
IAD
-
STN
2 stops25h 25m
Multiple Airlines
Deal found 2/17$609

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 February 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$545
(Mytrip)

One-way from

$489
(Mytrip)

Popular in

July

Cheapest in

January

Average price

$627
Provider with most accurate pricing for London Stansted-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Stansted-Washington, D.C. Dulles Intl flights.
Search Deals
From London Stansted to Washington, D.C. Dulles Intl
Search Deals
One-way flight from London Stansted to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated February 19, 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

Stansted

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 4/1

4:30 pm-4:50 pm

2 stops29h 20m

Washington, D.C. Dulles Intl

Wed 4/8

8:20 pm-11:20 pm

2 stops22h 00m

$597

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 3/27

6:30 am-4:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

Mon 3/30

8:55 pm-12:50 pm

1 stop10h 55m

$670

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 4/30

6:30 am-3:45 pm

1 stop14h 15m

Washington, D.C. Dulles Intl

Tue 5/5

5:15 pm-9:50 am

1 stop11h 35m

$678

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 4/16

8:45 pm-3:30 pm

1 stop23h 45m

Washington, D.C. Dulles Intl

Mon 4/20

8:30 pm-12:20 am

2 stops22h 50m

$694

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 4/2

6:30 am-3:45 pm

1 stop14h 15m

Washington, D.C. Dulles Intl

Thu 4/9

5:15 pm-7:50 am

1 stop9h 35m

$710

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 4/9

8:45 pm-3:30 pm

1 stop23h 45m

Washington, D.C. Dulles Intl

Mon 4/13

8:30 pm-2:50 pm

2 stops13h 20m

$719

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 5/1

3:25 pm-3:30 pm

1 stop29h 05m

Washington, D.C. Dulles Intl

Fri 5/8

8:30 pm-3:25 pm

2 stops13h 55m

$759

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 6/17

8:20 am-3:10 pm

2 stops35h 50m

Washington, D.C. Dulles Intl

Tue 8/11

3:25 pm-11:45 am

2 stops15h 20m

$763

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 3/7

6:30 am-4:14 pm

2 stops38h 44m

Washington, D.C. Dulles Intl

Sat 3/14

9:30 pm-7:05 am

1 stop29h 35m

$765

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 3/5

9:20 pm-9:00 pm

2 stops28h 40m

Washington, D.C. Dulles Intl

Sun 3/8

11:30 pm-10:35 pm

2 stops19h 05m

$780

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/15

Showing 1-10 of 21 results
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  • Most accurate provider: When it comes to deals on London Stansted Airport-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Stansted Airport-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Stansted Airport-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Stansted Airport-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Stansted Airport-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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 at night 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 Friday 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.

  • 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 vacation 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.

Traveling 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
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Laurel
Rockville
Upper Marlboro
Linthicum Heights
Manassas
Bowie
Largo
McLean
Clinton
Towson

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