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Cheap flights from Washington, D.C. Dulles Intl Airport to London, ON from C$ 396

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YXU
12 Apr — 19 Apr1
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 13 March 2026.

Thu 9/44:30 p.m.
IAD
-
YXU
1 stop4h 49m
Air Canada
Thu 16/49:25 a.m.
YXU
-
IAD
1 stop6h 14m
Air Canada
Deal found 10/3C$ 842
Sat 25/44:30 p.m.
IAD
-
YXU
1 stop4h 49m
Air Canada
Sat 2/59:30 a.m.
YXU
-
IAD
1 stop5h 59m
Air Canada
Deal found 11/3C$ 856
Sun 7/64:05 p.m.
IAD
-
YXU
1 stop5h 33m
Air Canada
Thu 11/63:30 p.m.
YXU
-
IAD
1 stop4h 59m
Air Canada
Deal found 12/3C$ 871
Thu 23/49:00 a.m.
IAD
-
YXU
1 stop8h 04m
Air Canada
Thu 30/49:25 a.m.
YXU
-
IAD
1 stop6h 14m
Air Canada
Deal found 9/3C$ 875
Sat 11/49:55 a.m.
IAD
-
YXU
2 stops7h 09m
Air Canada
Wed 15/49:25 a.m.
YXU
-
IAD
1 stop6h 14m
Air Canada
Deal found 12/3C$ 883
Wed 29/49:00 a.m.
IAD
-
YXU
1 stop12h 19m
Air Canada
Sat 2/55:40 a.m.
YXU
-
IAD
2 stops9h 23m
Air Canada
Deal found 8/3C$ 887
Wed 22/49:55 a.m.
IAD
-
YXU
2 stops7h 09m
Air Canada
Wed 29/49:25 a.m.
YXU
-
IAD
1 stop11h 04m
Air Canada
Deal found 9/3C$ 901

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 13 March 2026.

Round-trip from

C$ 842

One-way from

C$ 438
Air Canada
  • Air Canada
  • 9/4-16/4
  • 2 total stops
  • 11h 03m total
  • Washington, D.C. to London
Search Deals
Air Canada
  • Air Canada
  • 23/4
  • 1 total stop
  • 12h 19m 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 13 March 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

Sat 25/4

9:55 a.m.-5:04 p.m.

2 stops7h 09m

London

Sat 2/5

12:20 p.m.-6:58 p.m.

2 stops6h 38m

C$ 880

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 29/4

9:00 a.m.-9:19 p.m.

1 stop12h 19m

London

Sat 2/5

5:40 a.m.-3:03 p.m.

2 stops9h 23m

C$ 887

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 24/4

9:00 a.m.-5:04 p.m.

1 stop8h 04m

London

Fri 1/5

9:30 a.m.-3:29 p.m.

1 stop5h 59m

C$ 890

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 23/4

8:23 a.m.-5:04 p.m.

2 stops8h 41m

London

Thu 30/4

9:25 a.m.-3:39 p.m.

1 stop6h 14m

C$ 986
Quickest round-trip

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 25/4

4:30 p.m.-9:19 p.m.

1 stop4h 49m

London

Sat 2/5

9:30 a.m.-3:29 p.m.

1 stop5h 59m

C$ 1,003

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 22/4

9:55 a.m.-5:04 p.m.

2 stops7h 09m

London

Wed 29/4

5:10 a.m.-11:17 a.m.

2 stops6h 07m

C$ 1,011
Cheapest one-way
Quickest one-way

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 27/4

4:30 p.m.-9:19 p.m.

1 stop4h 49m

C$ 396

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 23/4

9:00 a.m.-9:19 p.m.

1 stop12h 19m

C$ 438

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 27/4

11:37 a.m.-5:20 a.m.

3 stops17h 43m

C$ 452

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 23/4

6:15 a.m.-9:19 p.m.

2 stops15h 04m

C$ 478

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/3

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

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.

Cheapflights Insights

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

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario?

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario (average of C$ 143). Flying from Washington, D.C. Dulles Intl Airport to London, Ontario in July is currently the most expensive (average of C$ 321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 7h 09m. Air Canada provides one of the quickest options available for as low as C$ 880. 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.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario (average of C$ 143). Flying from Washington, D.C. Dulles Intl Airport to London, Ontario in July is currently the most expensive (average of C$ 321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Dulles Intl to London. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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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