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Cheap flights from Washington, D.C. Dulles Intl Airport to London, ON from C$ 831

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YXU
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 28 October 2025.

Round-trip from

C$ 831
Air Canada
  • Air Canada
  • 11/12-18/12
  • 2 total stops
  • 11h 12m total
  • Washington, D.C. to London
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Find 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 28 October 2025.

Thu 11/124:30 p.m.IAD - YXU
1 stop4h 51mAir Canada
Thu 18/129:25 a.m.YXU - IAD
1 stop6h 21mAir Canada
Deal found 26/10C$ 831
Fri 12/124:30 p.m.IAD - YXU
1 stop4h 51mAir Canada
Fri 19/129:25 a.m.YXU - IAD
1 stop11h 01mAir Canada
Deal found 28/10C$ 863
Thu 11/128:45 a.m.IAD - YXU
2 stops8h 20mUnited Airlines
Thu 18/129:25 a.m.YXU - IAD
1 stop6h 21mUnited Airlines
Deal found 26/10C$ 964
Fri 12/124:30 p.m.IAD - YXU
1 stop4h 51mUnited Airlines
Fri 19/129:25 a.m.YXU - IAD
2 stops14h 50mUnited Airlines
Deal found 28/10C$ 1,050
Wed 24/1210:33 p.m.IAD - YXU
2 stops18h 32mUnited Airlines
Wed 31/129:25 a.m.YXU - IAD
1 stop6h 21mUnited Airlines
Deal found 26/10C$ 1,066
Wed 24/124:30 p.m.IAD - YXU
1 stop4h 51mAir Canada
Wed 31/129:25 a.m.YXU - IAD
1 stop6h 21mAir Canada
Deal found 26/10C$ 1,095
Fri 7/1110:35 p.m.IAD - YXU
2 stops18h 30mAir Canada
Tue 11/115:15 a.m.YXU - IAD
1 stop6h 30mAir Canada
Deal found 28/10C$ 1,373

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 28 October 2025.
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

Dulles Intl

Fly to

London

Route

Depart

Return

Price

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 11/12

4:30 p.m.-9:21 p.m.

1 stop4h 51m

London

Thu 18/12

9:25 a.m.-3:46 p.m.

1 stop6h 21m

C$ 831

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 14/1

4:30 p.m.-9:21 p.m.

1 stop4h 51m

London

Tue 20/1

5:15 a.m.-3:54 p.m.

1 stop10h 39m

C$ 863

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 12/12

4:30 p.m.-9:21 p.m.

1 stop4h 51m

London

Fri 19/12

9:25 a.m.-8:26 p.m.

1 stop11h 01m

C$ 863

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 30/3

9:55 a.m.-5:03 p.m.

2 stops7h 08m

London

Fri 3/4

9:25 a.m.-3:55 p.m.

1 stop6h 30m

C$ 870

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 11/12

8:45 a.m.-5:05 p.m.

2 stops8h 20m

London

Thu 18/12

9:25 a.m.-3:46 p.m.

1 stop6h 21m

C$ 964

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 14/1

8:20 a.m.-5:05 p.m.

2 stops8h 45m

London

Tue 20/1

5:40 p.m.-9:25 p.m.

1 stop3h 45m

C$ 964

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 14/1

11:40 a.m.-6:34 a.m.

3 stops18h 54m

London

Tue 20/1

8:10 p.m.-10:24 a.m.

3 stops38h 14m

C$ 1,042

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 12/12

4:30 p.m.-9:21 p.m.

1 stop4h 51m

London

Fri 19/12

9:25 a.m.-12:15 a.m.

2 stops14h 50m

C$ 1,050

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 24/12

10:33 p.m.-5:05 p.m.

2 stops18h 32m

London

Wed 31/12

9:25 a.m.-3:46 p.m.

1 stop6h 21m

C$ 1,066

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/10

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, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario (average of C$ 137). Flying from Washington, D.C. Dulles Intl Airport to London, Ontario in July is currently the most expensive (average of C$ 330). 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 4h 51m. Air Canada provides one of the quickest options available for as low as C$ 831. 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, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario (average of C$ 137). Flying from Washington, D.C. Dulles Intl Airport to London, Ontario in July is currently the most expensive (average of C$ 330). 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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Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to London?

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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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