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Cheap flights from Washington, D.C. to London from C$ 776

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. to London departing on 18/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from Washington, D.C. 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 51m
1 stop
Air Canada Logo
9:25 a.m. - 3:49 p.m.
YXU
-
IAD
6h 24m
1 stop
C$ 776Air Canada
Wed, 18 Feb - Thu, 19 Feb
Air Canada Logo
9:45 a.m. - 5:05 p.m.
IAD
-
YXU
7h 20m
2 stops
Air Canada Logo
9:25 a.m. - 3:49 p.m.
YXU
-
IAD
6h 24m
1 stop
C$ 788Air Canada
Wed, 18 Feb - Thu, 19 Feb
Air Canada Logo
9:45 a.m. - 5:05 p.m.
IAD
-
YXU
7h 20m
2 stops
Air Canada Logo
9:25 a.m. - 8:54 p.m.
YXU
-
IAD
11h 29m
2 stops
C$ 799Air Canada
Wed, 18 Feb - Thu, 19 Feb
Air Canada Logo
4:30 p.m. - 9:21 p.m.
IAD
-
YXU
4h 51m
1 stop
Air Canada Logo
9:25 a.m. - 3:49 p.m.
YXU
-
IAD
6h 24m
1 stop
C$ 886Air Canada
Wed, 18 Feb - Thu, 19 Feb
Air Canada Logo
12:55 p.m. - 9:21 p.m.
DCA
-
YXU
8h 26m
2 stops
Air Canada Logo
5:40 p.m. - 10:35 p.m.
YXU
-
DCA
4h 55m
1 stop
C$ 893Air Canada
Wed, 18 Feb - Thu, 19 Feb
Multiple Airlines Logo
11:40 a.m. - 6:35 a.m.
IAD
-
YXU
18h 55m
3 stops
Multiple Airlines Logo
9:25 a.m. - 3:49 p.m.
YXU
-
IAD
6h 24m
1 stop
C$ 896Multiple Airlines
Thu, 19 Feb - Wed, 25 Feb
Air Canada Logo
11:05 a.m. - 9:21 p.m.
DCA
-
YXU
10h 16m
2 stops
Air Canada Logo
5:40 p.m. - 10:35 p.m.
YXU
-
DCA
4h 55m
1 stop
C$ 897Air Canada
Sat, 7 Mar - Sat, 14 Mar
Air Canada Logo
9:45 a.m. - 9:21 p.m.
IAD
-
YXU
11h 36m
2 stops
Air Canada Logo
9:25 a.m. - 3:49 p.m.
YXU
-
IAD
6h 24m
1 stop
C$ 897Air Canada
Wed, 18 Feb - Thu, 19 Feb
United Airlines Logo
7:00 a.m. - 5:05 p.m.
DCA
-
YXU
10h 05m
2 stops
United Airlines Logo
5:40 p.m. - 10:35 p.m.
YXU
-
DCA
4h 55m
1 stop
C$ 1,018United Airlines
Fri, 20 Feb - Sat, 21 Feb
United Airlines Logo
9:40 a.m. - 5:05 p.m.
DCA
-
YXU
7h 25m
1 stop
United Airlines Logo
5:40 p.m. - 10:35 p.m.
YXU
-
DCA
4h 55m
1 stop
C$ 1,038United Airlines
Thu, 5 Mar - Fri, 13 Mar

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

Our best Air Canada deals on Washington, D.C. to London, Ontario flight tickets
Air Canada
18 Feb
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 51m
1 stop
YXU9:21 p.m.London
19 Feb
YXU9:25 a.m.London
6h 24m
1 stop
IAD3:49 p.m.Washington, D.C. Dulles Intl
C$ 776
Air Canada
18 Feb
IAD9:45 a.m.Washington, D.C. Dulles Intl
7h 20m
2 stops
YXU5:05 p.m.London
19 Feb
YXU9:25 a.m.London
6h 24m
1 stop
IAD3:49 p.m.Washington, D.C. Dulles Intl
C$ 788
Air Canada
18 Feb
IAD9:45 a.m.Washington, D.C. Dulles Intl
7h 20m
2 stops
YXU5:05 p.m.London
19 Feb
YXU9:25 a.m.London
11h 29m
2 stops
IAD8:54 p.m.Washington, D.C. Dulles Intl
C$ 799

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

Our best United Airlines deals on Washington, D.C. to London, Ontario flight tickets
United Airlines
5 Mar
IAD12:33 p.m.Washington, D.C. Dulles Intl
4h 32m
1 stop
YXU5:05 p.m.London
13 Mar
YXU9:25 a.m.London
6h 21m
1 stop
IAD3:46 p.m.Washington, D.C. Dulles Intl
C$ 1,005
United Airlines
20 Feb
DCA7:00 a.m.Washington, D.C. Reagan-National
10h 05m
2 stops
YXU5:05 p.m.London
21 Feb
YXU5:40 p.m.London
4h 55m
1 stop
DCA10:35 p.m.Washington, D.C. Reagan-National
C$ 1,018
United Airlines
5 Mar
DCA9:40 a.m.Washington, D.C. Reagan-National
7h 25m
1 stop
YXU5:05 p.m.London
13 Mar
YXU5:40 p.m.London
4h 55m
1 stop
DCA10:35 p.m.Washington, D.C. Reagan-National
C$ 1,038

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 21 January 2026.
Use the filters below to find and compare flights from Washington, D.C. 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

Wed 18/2

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

1 stop4h 51m

London

Thu 19/2

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

1 stop6h 24m

C$ 776

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 18/2

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

2 stops7h 20m

London

Thu 19/2

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

1 stop6h 24m

C$ 788

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 18/2

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

2 stops7h 20m

London

Thu 19/2

9:25 a.m.-8:54 p.m.

2 stops11h 29m

C$ 799

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 18/2

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

1 stop4h 51m

London

Thu 19/2

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

1 stop6h 24m

C$ 886

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Wed 18/2

12:55 p.m.-9:21 p.m.

2 stops8h 26m

London

Thu 19/2

5:40 p.m.-10:35 p.m.

1 stop4h 55m

C$ 893

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 19/2

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

3 stops18h 55m

London

Wed 25/2

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

1 stop6h 24m

C$ 896

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sat 7/3

11:05 a.m.-9:21 p.m.

2 stops10h 16m

London

Sat 14/3

5:40 p.m.-10:35 p.m.

1 stop4h 55m

C$ 897

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 18/2

9:45 a.m.-9:21 p.m.

2 stops11h 36m

London

Thu 19/2

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

1 stop6h 24m

C$ 897

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Fri 20/2

7:00 a.m.-5:05 p.m.

2 stops10h 05m

London

Sat 21/2

5:40 p.m.-10:35 p.m.

1 stop4h 55m

C$ 1,018

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Thu 5/3

9:40 a.m.-5:05 p.m.

1 stop7h 25m

London

Fri 13/3

5:40 p.m.-10:35 p.m.

1 stop4h 55m

C$ 1,038

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. 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

Which airlines fly to London, Ontario?

Air Canada, United Airlines and WestJet are the top three most popular airlines that fly to London, Ontario from Washington, D.C. according to our data. Air Canada is the first choice among our users, with 73% of people opting to fly with this airline when travelling to London, Ontario. Keep in mind that there are 3 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to London, Ontario (WAS to YXU) flight deals and tips

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

Fastest flight time

4h 50m

Direct flights

None
The fastest flight from Washington, D.C. to London, Ontario takes 4h 50m
There are no direct flights from Washington, D.C. to London, Ontario. There are no popular flight routes from Washington, D.C. to London, Ontario.
Search flight deals

  • How far is Washington, D.C. to London by plane?

    Washington, D.C. and London are 573.8 km apart from one another. In terms of flight time, this usually takes a little over 4h 50m.

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

    Prices for flights from Washington, D.C. to London Airport refresh daily.

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

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

    The travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Washington, D.C..

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

momondo does allow users to show only those flights to London from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential Washington, D.C. to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to London from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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