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Cheap flights from Washington, D.C. to London from C$ 381

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. to London departing on 15/5. 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 51m1 stop
Air Canada Logo
9:50 a.m. - 3:46 p.m.
YXU
-
IAD
5h 56m1 stop
C$ 818Air Canada
Thu, 22 Jan - Mon, 26 Jan
Air Canada Logo
12:55 p.m. - 9:20 p.m.
DCA
-
YXU
8h 25m2 stops
Air Canada Logo
5:10 a.m. - 8:55 a.m.
YXU
-
DCA
3h 45m1 stop
C$ 825Air Canada
Sun, 25 Jan - Wed, 28 Jan
Air Canada Logo
4:30 p.m. - 9:21 p.m.
IAD
-
YXU
4h 51m1 stop
Air Canada Logo
9:50 a.m. - 8:54 p.m.
YXU
-
IAD
11h 04m2 stops
C$ 830Air Canada
Thu, 22 Jan - Mon, 26 Jan
Air Canada Logo
12:55 p.m. - 9:20 p.m.
DCA
-
YXU
8h 25m2 stops
Air Canada Logo
5:10 a.m. - 12:19 p.m.
YXU
-
DCA
7h 09m2 stops
C$ 833Air Canada
Sun, 25 Jan - Wed, 28 Jan
Air Canada Logo
9:45 a.m. - 9:21 p.m.
IAD
-
YXU
11h 36m2 stops
Air Canada Logo
9:50 a.m. - 8:54 p.m.
YXU
-
IAD
11h 04m2 stops
C$ 841Air Canada
Thu, 22 Jan - Mon, 26 Jan
Air Canada Logo
6:59 a.m. - 5:05 p.m.
DCA
-
YXU
10h 06m1 stop
Air Canada Logo
5:40 p.m. - 10:35 p.m.
YXU
-
DCA
4h 55m1 stop
C$ 851Air Canada
Sun, 25 Jan - Wed, 28 Jan
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$ 863Air 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$ 874Air Canada
Mon, 12 Jan - Mon, 19 Jan
United Airlines Logo
12:35 p.m. - 5:05 p.m.
IAD
-
YXU
4h 30m1 stop
United Airlines Logo
9:25 a.m. - 3:49 p.m.
YXU
-
IAD
6h 24m1 stop
C$ 936United Airlines
Thu, 29 Jan - Thu, 5 Feb
United Airlines Logo
6:00 a.m. - 5:05 p.m.
DCA
-
YXU
11h 05m2 stops
United Airlines Logo
5:10 a.m. - 8:55 a.m.
YXU
-
DCA
3h 45m1 stop
C$ 950United Airlines
Thu, 29 Jan - Thu, 5 Feb

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
29 Jan
IAD12:35 p.m.Washington, D.C. Dulles Intl
4h 30m
1 stop
YXU5:05 p.m.London
5 Feb
YXU9:25 a.m.London
6h 24m
1 stop
IAD3:49 p.m.Washington, D.C. Dulles Intl
C$ 936
Find similar
United Airlines
29 Jan
DCA6:00 a.m.Washington, D.C. Reagan-National
11h 05m
2 stops
YXU5:05 p.m.London
5 Feb
YXU5:10 a.m.London
3h 45m
1 stop
DCA8:55 a.m.Washington, D.C. Reagan-National
C$ 950
Find similar
United Airlines
30 Jan
IAD8:20 a.m.Washington, D.C. Dulles Intl
8h 45m
2 stops
YXU5:05 p.m.London
6 Feb
YXU5:40 p.m.London
3h 45m
1 stop
IAD9:25 p.m.Washington, D.C. Dulles Intl
C$ 965
Find similar

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
22 Jan
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 51m
1 stop
YXU9:21 p.m.London
26 Jan
YXU9:50 a.m.London
5h 56m
1 stop
IAD3:46 p.m.Washington, D.C. Dulles Intl
C$ 818
Find similar
Air Canada
25 Jan
DCA12:55 p.m.Washington, D.C. Reagan-National
8h 25m
2 stops
YXU9:20 p.m.London
28 Jan
YXU5:10 a.m.London
3h 45m
1 stop
DCA8:55 a.m.Washington, D.C. Reagan-National
C$ 825
Find similar
Air Canada
22 Jan
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 51m
1 stop
YXU9:21 p.m.London
26 Jan
YXU9:50 a.m.London
11h 04m
2 stops
IAD8:54 p.m.Washington, D.C. Dulles Intl
C$ 830
Find similar

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 16 December 2025.
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

Thu 22/1

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

1 stop4h 51m

London

Mon 26/1

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

1 stop5h 56m

C$ 818

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sun 25/1

12:55 p.m.-9:20 p.m.

2 stops8h 25m

London

Wed 28/1

5:10 a.m.-8:55 a.m.

1 stop3h 45m

C$ 825

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 22/1

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

1 stop4h 51m

London

Mon 26/1

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

2 stops11h 04m

C$ 830

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sun 25/1

12:55 p.m.-9:20 p.m.

2 stops8h 25m

London

Wed 28/1

5:10 a.m.-12:19 p.m.

2 stops7h 09m

C$ 833

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 22/1

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

2 stops11h 36m

London

Mon 26/1

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

2 stops11h 04m

C$ 841

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sun 25/1

6:59 a.m.-5:05 p.m.

1 stop10h 06m

London

Wed 28/1

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

1 stop4h 55m

C$ 851

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$ 863

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$ 874

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 29/1

12:35 p.m.-5:05 p.m.

1 stop4h 30m

London

Thu 5/2

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

1 stop6h 24m

C$ 936

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Thu 29/1

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

2 stops11h 05m

London

Thu 5/2

5:10 a.m.-8:55 a.m.

1 stop3h 45m

C$ 950

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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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

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

Air Canada and WestJet are the most popular carriers operating from Washington, D.C. to London

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 74% 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 30m

Direct flights

None
The fastest flight from Washington, D.C. to London, Ontario takes 4h 30m
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 30m.

  • 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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