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Cheap flights from Washington, D.C. Dulles Intl Airport to London, ON from C$ 985

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YXU
12 Jul — 19 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Dulles Intl to London

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 June 2026.

Fri 9/109:55 a.m.
IAD
-
YXU
1 stop5h 00m
Air Canada
Mon 12/103:30 p.m.
YXU
-
IAD
1 stop4h 55m
Air Canada
Deal found 11/6C$ 985
Fri 4/99:55 a.m.
IAD
-
YXU
1 stop5h 00m
United Airlines
Mon 7/93:30 p.m.
YXU
-
IAD
2 stops7h 29m
United Airlines
Deal found 8/6C$ 1,007
Fri 9/1010:40 p.m.
IAD
-
YXU
2 stops16h 15m
United Airlines
Mon 12/1010:05 a.m.
YXU
-
IAD
2 stops12h 54m
United Airlines
Deal found 8/6C$ 1,021
Sat 4/74:20 p.m.
IAD
-
YXU
1 stop4h 12m
Air Canada
Fri 10/710:05 a.m.
YXU
-
IAD
1 stop5h 19m
Air Canada
Deal found 10/6C$ 1,034
Thu 2/74:20 p.m.
IAD
-
YXU
1 stop5h 20m
Air Canada
Sun 5/710:05 a.m.
YXU
-
IAD
1 stop5h 19m
Air Canada
Deal found 11/6C$ 1,129
Fri 18/96:15 a.m.
IAD
-
YXU
2 stops8h 40m
United Airlines
Wed 23/93:30 p.m.
YXU
-
IAD
1 stop5h 54m
United Airlines
Deal found 9/6C$ 1,148
Fri 3/74:20 p.m.
IAD
-
YXU
1 stop5h 20m
Air Canada
Mon 6/73:30 p.m.
YXU
-
IAD
1 stop4h 54m
Air Canada
Deal found 11/6C$ 1,154

Find flight deals from Dulles Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to London (YXU). 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 12 June 2026.

Round-trip from

C$ 985
Air Canada
  • Air Canada
  • 9/10-12/10
  • 2 total stops
  • 9h 55m total
  • Washington, D.C. to London
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to London 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 629,999 searches. Data last updated 12 June 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 4/9

9:55 a.m.-2:55 p.m.

1 stop5h 00m

London

Mon 7/9

10:05 a.m.-3:24 p.m.

1 stop5h 19m

C$ 985

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 9/10

9:55 a.m.-2:55 p.m.

1 stop5h 00m

London

Mon 12/10

5:40 a.m.-3:00 p.m.

2 stops9h 20m

C$ 997

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 9/10

10:40 p.m.-2:55 p.m.

2 stops16h 15m

London

Mon 12/10

10:05 a.m.-10:59 p.m.

2 stops12h 54m

C$ 1,021
Quickest round-trip

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 17/7

9:55 a.m.-2:52 p.m.

1 stop4h 57m

London

Mon 20/7

3:30 p.m.-8:24 p.m.

1 stop4h 54m

C$ 1,034

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 4/7

4:20 p.m.-8:32 p.m.

1 stop4h 12m

London

Fri 10/7

10:05 a.m.-7:01 p.m.

2 stops8h 56m

C$ 1,045

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 2/7

4:20 p.m.-9:40 p.m.

1 stop5h 20m

London

Sun 5/7

10:05 a.m.-3:24 p.m.

1 stop5h 19m

C$ 1,129

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 18/9

6:15 a.m.-2:55 p.m.

2 stops8h 40m

London

Wed 23/9

3:30 p.m.-9:24 p.m.

1 stop5h 54m

C$ 1,148

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Sorted by cheapest first

Best time to book a flight from Dulles Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from Dulles Intl 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.

Related info for your journey

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

  • What airport do you fly into for flights to London from Washington, D.C. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to London, you will be flying into London. London (YXU) is just 8.6 km from the centre of the city. London is the only London airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 0 airlines have flights to London from Washington, D.C. Dulles Intl on a regular basis.

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

    A quick flight from Washington, D.C. Dulles Intl Airport to London, Ontario can take about 5h. United Airlines provides one of the quickest options available for as low as C$ 985. Airlines will cover a distance of 549 km.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to London 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 London?

Book flights to London if you plan to visit one of these locations
Port Stanley
Grand Bend

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

Cheapflights helps you find that perfect flight to London from Dulles Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Certainly. Search results for flights to London from Dulles Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Not ready to book yet? You can track prices for flights from Dulles Intl to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

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