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Cheap flights from Washington, D.C. to London from C$ 366

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 20/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from Washington, D.C. to London

Cheap round-trip flights

Air Canada Logo
11:00 a.m. - 3:02 p.m.DCA-YXU
4h 02m1 stop
Air Canada Logo
3:40 p.m. - 7:44 p.m.YXU-DCA
4h 04m1 stop
C$ 772Air Canada
Find Deal
Mon, 20 Oct - Fri, 24 Oct
Air Canada Logo
10:20 a.m. - 3:02 p.m.IAD-YXU
4h 42m1 stop
Air Canada Logo
9:55 a.m. - 1:38 p.m.YXU-IAD
3h 43m1 stop
C$ 772Air Canada
Find Deal
Mon, 20 Oct - Fri, 24 Oct
Air Canada Logo
11:00 a.m. - 3:02 p.m.DCA-YXU
4h 02m1 stop
Air Canada Logo
6:15 a.m. - 3:51 p.m.YXU-DCA
9h 36m2 stops
C$ 780Air Canada
Find Deal
Mon, 20 Oct - Fri, 24 Oct
Air Canada Logo
6:00 a.m. - 3:02 p.m.DCA-YXU
9h 02m2 stops
Air Canada Logo
6:15 a.m. - 12:08 p.m.YXU-DCA
5h 53m2 stops
C$ 787Air Canada
Find Deal
Mon, 20 Oct - Fri, 24 Oct
Multiple Airlines Logo
7:14 p.m. - 5:12 a.m.IAD-YXU
33h 58m2 stops
Multiple Airlines Logo
6:00 a.m. - 5:50 p.m.YXU-IAD
11h 50m1 stop
C$ 806Multiple Airlines
Find Deal
Sun, 5 Oct - Fri, 10 Oct
Multiple Airlines Logo
6:15 a.m. - 9:27 p.m.IAD-YXU
15h 12m2 stops
Multiple Airlines Logo
9:55 a.m. - 9:05 p.m.YXU-IAD
11h 10m2 stops
C$ 911Multiple Airlines
Find Deal
Mon, 20 Oct - Fri, 24 Oct
United Airlines Logo
10:05 a.m. - 5:06 p.m.DCA-YXU
7h 01m2 stops
United Airlines Logo
5:40 p.m. - 10:35 p.m.YXU-DCA
4h 55m1 stop
C$ 919United Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
United Airlines Logo
7:00 a.m. - 5:06 p.m.DCA-YXU
10h 06m2 stops
United Airlines Logo
9:25 a.m. - 5:25 p.m.YXU-DCA
8h 00m2 stops
C$ 924United Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
WestJet Logo
7:25 p.m. - 5:12 a.m.DCA-YXU
33h 47m3 stops
WestJet Logo
6:00 a.m. - 10:51 p.m.YXU-DCA
16h 51m3 stops
C$ 1,440WestJet
Find Deal
Mon, 20 Oct - Fri, 24 Oct
WestJet Logo
6:15 a.m. - 7:12 p.m.IAD-YXU
12h 57m2 stops
WestJet Logo
8:10 p.m. - 2:36 p.m.YXU-IAD
18h 26m2 stops
C$ 2,292WestJet
Find Deal
Thu, 30 Oct - Thu, 6 Nov

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
20 Oct
DCA11:00 a.m.Washington, D.C. Reagan-National
4h 02m
1 stop
YXU3:02 p.m.London
24 Oct
YXU3:40 p.m.London
4h 04m
1 stop
DCA7:44 p.m.Washington, D.C. Reagan-National
C$ 772
Find similar
Air Canada
20 Oct
DCA11:00 a.m.Washington, D.C. Reagan-National
4h 02m
1 stop
YXU3:02 p.m.London
24 Oct
YXU6:15 a.m.London
9h 36m
2 stops
DCA3:51 p.m.Washington, D.C. Reagan-National
C$ 780
Find similar
Air Canada
20 Oct
DCA6:00 a.m.Washington, D.C. Reagan-National
9h 02m
2 stops
YXU3:02 p.m.London
24 Oct
YXU6:15 a.m.London
5h 53m
2 stops
DCA12:08 p.m.Washington, D.C. Reagan-National
C$ 787
Find similar

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
30 Oct
DCA10:05 a.m.Washington, D.C. Reagan-National
7h 01m
2 stops
YXU5:06 p.m.London
6 Nov
YXU5:40 p.m.London
4h 55m
1 stop
DCA10:35 p.m.Washington, D.C. Reagan-National
C$ 919
Find similar
United Airlines
30 Oct
DCA7:00 a.m.Washington, D.C. Reagan-National
10h 06m
2 stops
YXU5:06 p.m.London
6 Nov
YXU9:25 a.m.London
8h 00m
2 stops
DCA5:25 p.m.Washington, D.C. Reagan-National
C$ 924
Find similar
United Airlines
30 Oct
DCA7:00 a.m.Washington, D.C. Reagan-National
10h 06m
2 stops
YXU5:06 p.m.London
6 Nov
YXU9:25 a.m.London
8h 40m
1 stop
DCA6:05 p.m.Washington, D.C. Reagan-National
C$ 937
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 17 September 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

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Mon 20/10

11:00 a.m.-3:02 p.m.

1 stop4h 02m

London

Fri 24/10

3:40 p.m.-7:44 p.m.

1 stop4h 04m

C$ 772

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 20/10

10:20 a.m.-3:02 p.m.

1 stop4h 42m

London

Fri 24/10

9:55 a.m.-1:38 p.m.

1 stop3h 43m

C$ 772

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Mon 20/10

11:00 a.m.-3:02 p.m.

1 stop4h 02m

London

Fri 24/10

6:15 a.m.-3:51 p.m.

2 stops9h 36m

C$ 780

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Mon 20/10

6:00 a.m.-3:02 p.m.

2 stops9h 02m

London

Fri 24/10

6:15 a.m.-12:08 p.m.

2 stops5h 53m

C$ 787

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sun 5/10

7:14 p.m.-5:12 a.m.

2 stops33h 58m

London

Fri 10/10

6:00 a.m.-5:50 p.m.

1 stop11h 50m

C$ 806

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 20/10

6:15 a.m.-9:27 p.m.

2 stops15h 12m

London

Fri 24/10

9:55 a.m.-9:05 p.m.

2 stops11h 10m

C$ 911

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Thu 30/10

10:05 a.m.-5:06 p.m.

2 stops7h 01m

London

Thu 6/11

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

1 stop4h 55m

C$ 919

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Thu 30/10

7:00 a.m.-5:06 p.m.

2 stops10h 06m

London

Thu 6/11

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

2 stops8h 00m

C$ 924

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Mon 20/10

7:25 p.m.-5:12 a.m.

3 stops33h 47m

London

Fri 24/10

6:00 a.m.-10:51 p.m.

3 stops16h 51m

C$ 1,440

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 30/10

6:15 a.m.-7:12 p.m.

2 stops12h 57m

London

Thu 6/11

8:10 p.m.-2:36 p.m.

2 stops18h 26m

C$ 2,292

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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, United Airlines, 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 71% 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

Direct flights

None
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.
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  • 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 02m.

  • 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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