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Cheap flights from Washington, D.C. Dulles Intl Airport to London from C$ 833

This is the cheapest round-trip 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 21/4. 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. - 9:18 p.m.
IAD
-
YXU
4h 48m1 stop
Air Canada Logo
9:25 a.m. - 3:39 p.m.
YXU
-
IAD
6h 14m1 stop
C$ 833Air Canada
Tue, 21 Apr - Fri, 24 Apr
Air Canada Logo
4:30 p.m. - 9:18 p.m.
IAD
-
YXU
4h 48m1 stop
Air Canada Logo
9:25 a.m. - 7:40 p.m.
YXU
-
IAD
10h 15m2 stops
C$ 845Air Canada
Tue, 21 Apr - Fri, 24 Apr
Air Canada Logo
9:55 a.m. - 5:03 p.m.
IAD
-
YXU
7h 08m2 stops
Air Canada Logo
9:25 a.m. - 7:40 p.m.
YXU
-
IAD
10h 15m2 stops
C$ 856Air Canada
Tue, 21 Apr - Fri, 24 Apr
Air Canada Logo
4:30 p.m. - 9:20 p.m.
IAD
-
YXU
4h 50m1 stop
Air Canada Logo
9:50 a.m. - 3:46 p.m.
YXU
-
IAD
5h 56m1 stop
C$ 922Air Canada
Mon, 12 Jan - Mon, 19 Jan
Air Canada Logo
9:45 a.m. - 5:05 p.m.
IAD
-
YXU
7h 20m2 stops
Air Canada Logo
9:50 a.m. - 3:46 p.m.
YXU
-
IAD
5h 56m1 stop
C$ 933Air Canada
Mon, 12 Jan - Mon, 19 Jan
United Airlines Logo
12:40 p.m. - 9:20 p.m.
IAD
-
YXU
8h 40m2 stops
United Airlines Logo
9:25 a.m. - 3:49 p.m.
YXU
-
IAD
6h 24m1 stop
C$ 965United Airlines
Wed, 4 Feb - Wed, 11 Feb
Air Canada Logo
9:45 a.m. - 5:05 p.m.
IAD
-
YXU
7h 20m2 stops
Air Canada Logo
9:25 a.m. - 4:13 p.m.
YXU
-
IAD
6h 48m2 stops
C$ 971Air Canada
Wed, 4 Feb - Wed, 11 Feb
United Airlines Logo
12:40 p.m. - 9:20 p.m.
IAD
-
YXU
8h 40m2 stops
United Airlines Logo
9:25 a.m. - 5:35 p.m.
YXU
-
IAD
8h 10m2 stops
C$ 986United Airlines
Wed, 4 Feb - Wed, 11 Feb
Air Canada Logo
9:45 a.m. - 5:05 p.m.
IAD
-
YXU
7h 20m2 stops
Air Canada Logo
9:50 a.m. - 8:54 p.m.
YXU
-
IAD
11h 04m2 stops
C$ 987Air Canada
Mon, 12 Jan - Mon, 19 Jan
Multiple Airlines Logo
11:40 a.m. - 6:35 a.m.
IAD
-
YXU
18h 55m3 stops
Multiple Airlines Logo
8:10 p.m. - 5:14 p.m.
YXU
-
IAD
21h 04m3 stops
C$ 1,220Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb

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
21 Apr
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 48m
1 stop
YXU9:18 p.m.London
24 Apr
YXU9:25 a.m.London
6h 14m
1 stop
IAD3:39 p.m.Washington, D.C. Dulles Intl
C$ 833
Find similar
Air Canada
21 Apr
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 48m
1 stop
YXU9:18 p.m.London
24 Apr
YXU9:25 a.m.London
10h 15m
2 stops
IAD7:40 p.m.Washington, D.C. Dulles Intl
C$ 845
Find similar
Air Canada
4 Feb
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 50m
1 stop
YXU9:20 p.m.London
11 Feb
YXU9:25 a.m.London
6h 24m
1 stop
IAD3:49 p.m.Washington, D.C. Dulles Intl
C$ 848
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
4 Feb
IAD12:40 p.m.Washington, D.C. Dulles Intl
8h 40m
2 stops
YXU9:20 p.m.London
11 Feb
YXU9:25 a.m.London
6h 24m
1 stop
IAD3:49 p.m.Washington, D.C. Dulles Intl
C$ 965
Find similar
United Airlines
4 Feb
IAD12:40 p.m.Washington, D.C. Dulles Intl
8h 40m
2 stops
YXU9:20 p.m.London
11 Feb
YXU9:25 a.m.London
6h 24m
1 stop
IAD3:49 p.m.Washington, D.C. Dulles Intl
C$ 980
Find similar
United Airlines
4 Feb
IAD12:40 p.m.Washington, D.C. Dulles Intl
8h 40m
2 stops
YXU9:20 p.m.London
11 Feb
YXU9:25 a.m.London
8h 10m
2 stops
IAD5:35 p.m.Washington, D.C. Dulles Intl
C$ 986
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 December 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

Tue 21/4

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

1 stop4h 48m

London

Fri 24/4

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

1 stop6h 14m

C$ 833

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Tue 21/4

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

1 stop4h 48m

London

Fri 24/4

9:25 a.m.-7:40 p.m.

2 stops10h 15m

C$ 845

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Tue 21/4

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

2 stops7h 08m

London

Fri 24/4

9:25 a.m.-7:40 p.m.

2 stops10h 15m

C$ 856

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 12/1

4:30 p.m.-9:20 p.m.

1 stop4h 50m

London

Mon 19/1

9:50 a.m.-3:46 p.m.

1 stop5h 56m

C$ 922

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 12/1

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

2 stops7h 20m

London

Mon 19/1

9:50 a.m.-3:46 p.m.

1 stop5h 56m

C$ 933

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 4/2

12:40 p.m.-9:20 p.m.

2 stops8h 40m

London

Wed 11/2

9:25 a.m.-3:49 p.m.

1 stop6h 24m

C$ 965

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 4/2

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

2 stops7h 20m

London

Wed 11/2

9:25 a.m.-4:13 p.m.

2 stops6h 48m

C$ 971

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 4/2

12:40 p.m.-9:20 p.m.

2 stops8h 40m

London

Wed 11/2

9:25 a.m.-5:35 p.m.

2 stops8h 10m

C$ 986

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 12/1

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

2 stops7h 20m

London

Mon 19/1

9:50 a.m.-8:54 p.m.

2 stops11h 04m

C$ 987

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 4/2

11:40 a.m.-6:35 a.m.

3 stops18h 55m

London

Wed 11/2

8:10 p.m.-5:14 p.m.

3 stops21h 04m

C$ 1,220

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?

Air Canada 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

Fastest flight time

4h 05m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to London, Ontario takes 4h 05m
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 05m.

  • 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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