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Cheap flights from Washington, D.C. Dulles Intl Airport to London from C$ 448

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to London departing on 6/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
4:30 p.m. - 9:21 p.m.IAD-YXU
4h 51m1 stop
Air Canada Logo
9:25 a.m. - 3:46 p.m.YXU-IAD
6h 21m1 stop
C$ 830Air Canada
Find Deal
Sat, 6 Dec - Sat, 13 Dec
Air Canada Logo
4:30 p.m. - 9:21 p.m.IAD-YXU
4h 51m1 stop
Air Canada Logo
9:25 a.m. - 3:46 p.m.YXU-IAD
6h 21m1 stop
C$ 832Air Canada
Find Deal
Fri, 5 Dec - Fri, 12 Dec
Air Canada Logo
9:45 a.m. - 5:05 p.m.IAD-YXU
7h 20m2 stops
Air Canada Logo
9:25 a.m. - 3:46 p.m.YXU-IAD
6h 21m1 stop
C$ 839Air Canada
Find Deal
Sun, 7 Dec - Sun, 14 Dec
Air Canada Logo
4:30 p.m. - 9:18 p.m.IAD-YXU
4h 48m1 stop
Air Canada Logo
9:25 a.m. - 3:55 p.m.YXU-IAD
6h 30m1 stop
C$ 865Air Canada
Find Deal
Sun, 5 Apr - Sat, 11 Apr
Multiple Airlines Logo
4:30 p.m. - 9:18 p.m.IAD-YXU
4h 48m1 stop
Multiple Airlines Logo
5:10 a.m. - 1:01 p.m.YXU-IAD
7h 51m2 stops
C$ 928Multiple Airlines
Find Deal
Sun, 5 Apr - Sat, 11 Apr
Air Canada Logo
9:45 a.m. - 5:05 p.m.IAD-YXU
7h 20m2 stops
Air Canada Logo
9:25 a.m. - 3:46 p.m.YXU-IAD
6h 21m1 stop
C$ 941Air Canada
Find Deal
Fri, 5 Dec - Fri, 12 Dec
United Airlines Logo
4:30 p.m. - 9:21 p.m.IAD-YXU
4h 51m1 stop
United Airlines Logo
5:40 p.m. - 9:20 p.m.YXU-IAD
3h 40m1 stop
C$ 952United Airlines
Find Deal
Fri, 5 Dec - Fri, 12 Dec
United Airlines Logo
1:10 p.m. - 9:21 p.m.IAD-YXU
8h 11m2 stops
United Airlines Logo
9:25 a.m. - 3:46 p.m.YXU-IAD
6h 21m1 stop
C$ 965United Airlines
Find Deal
Sat, 6 Dec - Sat, 13 Dec
Multiple Airlines Logo
8:15 a.m. - 5:03 p.m.IAD-YXU
8h 48m2 stops
Multiple Airlines Logo
5:10 a.m. - 11:16 a.m.YXU-IAD
6h 06m2 stops
C$ 970Multiple Airlines
Find Deal
Sun, 5 Apr - Sat, 11 Apr
United Airlines Logo
6:00 a.m. - 5:05 p.m.IAD-YXU
11h 05m2 stops
United Airlines Logo
9:25 a.m. - 5:30 p.m.YXU-IAD
8h 05m2 stops
C$ 987United Airlines
Find Deal
Fri, 5 Dec - Fri, 12 Dec

Air Canada flights from Washington, D.C. Dulles Intl Airport to London, Ontario

Our best Air Canada deals on Washington, D.C. Dulles Intl Airport to London, Ontario flight tickets
Air Canada
6 Dec
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 51m
1 stop
YXU9:21 p.m.London
13 Dec
YXU9:25 a.m.London
6h 21m
1 stop
IAD3:46 p.m.Washington, D.C. Dulles Intl
C$ 830
Find similar
Air Canada
5 Dec
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 51m
1 stop
YXU9:21 p.m.London
12 Dec
YXU9:25 a.m.London
6h 21m
1 stop
IAD3:46 p.m.Washington, D.C. Dulles Intl
C$ 832
Find similar
Air Canada
7 Dec
IAD9:45 a.m.Washington, D.C. Dulles Intl
7h 20m
2 stops
YXU5:05 p.m.London
14 Dec
YXU9:25 a.m.London
6h 21m
1 stop
IAD3:46 p.m.Washington, D.C. Dulles Intl
C$ 839
Find similar

United Airlines flights from Washington, D.C. Dulles Intl Airport to London, Ontario

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to London, Ontario flight tickets
United Airlines
5 Dec
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 51m
1 stop
YXU9:21 p.m.London
12 Dec
YXU5:40 p.m.London
3h 40m
1 stop
IAD9:20 p.m.Washington, D.C. Dulles Intl
C$ 952
Find similar
United Airlines
6 Dec
IAD1:10 p.m.Washington, D.C. Dulles Intl
8h 11m
2 stops
YXU9:21 p.m.London
13 Dec
YXU9:25 a.m.London
6h 21m
1 stop
IAD3:46 p.m.Washington, D.C. Dulles Intl
C$ 965
Find similar
United Airlines
5 Dec
IAD6:00 a.m.Washington, D.C. Dulles Intl
11h 05m
2 stops
YXU5:05 p.m.London
12 Dec
YXU9:25 a.m.London
8h 05m
2 stops
IAD5:30 p.m.Washington, D.C. Dulles Intl
C$ 987
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to London, Ontario 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, momondo users made 96,600 searches. Data last updated 23 October 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 6/12

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

1 stop4h 51m

London

Sat 13/12

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

1 stop6h 21m

C$ 830

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 5/12

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

1 stop4h 51m

London

Fri 12/12

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

1 stop6h 21m

C$ 832

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sun 7/12

9:45 a.m.-5:05 p.m.

2 stops7h 20m

London

Sun 14/12

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

1 stop6h 21m

C$ 839

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sun 5/4

4:30 p.m.-9:18 p.m.

1 stop4h 48m

London

Sat 11/4

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

1 stop6h 30m

C$ 865

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sun 5/4

4:30 p.m.-9:18 p.m.

1 stop4h 48m

London

Sat 11/4

5:10 a.m.-1:01 p.m.

2 stops7h 51m

C$ 928

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 5/12

9:45 a.m.-5:05 p.m.

2 stops7h 20m

London

Fri 12/12

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

1 stop6h 21m

C$ 941

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 5/12

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

1 stop4h 51m

London

Fri 12/12

5:40 p.m.-9:20 p.m.

1 stop3h 40m

C$ 952

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 6/12

1:10 p.m.-9:21 p.m.

2 stops8h 11m

London

Sat 13/12

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

1 stop6h 21m

C$ 965

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sun 5/4

8:15 a.m.-5:03 p.m.

2 stops8h 48m

London

Sat 11/4

5:10 a.m.-11:16 a.m.

2 stops6h 06m

C$ 970

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 5/12

6:00 a.m.-5:05 p.m.

2 stops11h 05m

London

Fri 12/12

9:25 a.m.-5:30 p.m.

2 stops8h 05m

C$ 987

Flights are sorted by cheapest round-trip flights first.

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See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to London, Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to London?

United Airlines is the most popular carrier operating from Washington, D.C. Dulles Intl to London

When to book flights from Washington, D.C. Dulles Intl Airport to London, Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to London, Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to London, Ontario (IAD to YXU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to London, Ontario

Direct flights

None
There are no direct flights from Washington, D.C. Dulles Intl Airport to London, Ontario. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to London, Ontario.
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  • How far is Washington, D.C. Dulles Intl to London by plane?

    The distance between Washington, D.C. Dulles Intl and London is about 549.2 km. A reasonable flight in good conditions will take 4h 06m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to London Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to London Airport were last updated today.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to London Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to London Airport.

  • What documentation or ID do you need to fly to London Airport?

    The travel and health documents you'll need for your trip to London Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

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

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to London for you.

Can I find flights from Washington, D.C. to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington, D.C. to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington, D.C. to London?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Washington, D.C..

I’m not ready to book a flight from Washington, D.C. to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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