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Cheap flights from Washington, D.C. 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. to London departing on 3/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
6:59 a.m. - 11:43 a.m.
DCA
-
YXU
4h 44m1 stop
Air Canada Logo
6:10 p.m. - 10:28 p.m.
YXU
-
DCA
4h 18m1 stop
C$ 833Air Canada
Sun, 3 May - Wed, 6 May
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
12:45 p.m. - 9:38 p.m.
DCA
-
YXU
8h 53m2 stops
Air Canada Logo
6:10 p.m. - 10:28 p.m.
YXU
-
DCA
4h 18m1 stop
C$ 840Air Canada
Sun, 3 May - Wed, 6 May
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
12:45 p.m. - 9:38 p.m.
DCA
-
YXU
8h 53m2 stops
Air Canada Logo
6:00 a.m. - 12:01 p.m.
YXU
-
DCA
6h 01m2 stops
C$ 847Air Canada
Sun, 3 May - Wed, 6 May
Air Canada Logo
6:59 a.m. - 11:43 a.m.
DCA
-
YXU
4h 44m1 stop
Air Canada Logo
12:20 p.m. - 6:13 p.m.
YXU
-
DCA
5h 53m1 stop
C$ 848Air Canada
Sun, 3 May - Wed, 6 May
United Airlines Logo
1:18 p.m. - 9:20 p.m.
DCA
-
YXU
8h 02m2 stops
United Airlines Logo
5:10 a.m. - 8:55 a.m.
YXU
-
DCA
3h 45m1 stop
C$ 965United Airlines
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. - 3:49 p.m.
YXU
-
IAD
6h 24m1 stop
C$ 965United Airlines
Wed, 4 Feb - Wed, 11 Feb
United Airlines Logo
1:18 p.m. - 9:20 p.m.
DCA
-
YXU
8h 02m2 stops
United Airlines Logo
5:40 p.m. - 10:35 p.m.
YXU
-
DCA
4h 55m1 stop
C$ 980United Airlines
Wed, 4 Feb - Wed, 11 Feb
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. to London, Ontario

Our best Air Canada deals on Washington, D.C. to London, Ontario flight tickets
Air Canada
3 May
DCA6:59 a.m.Washington, D.C. Reagan-National
4h 44m
1 stop
YXU11:43 a.m.London
6 May
YXU6:10 p.m.London
4h 18m
1 stop
DCA10:28 p.m.Washington, D.C. Reagan-National
C$ 833
Find similar
Air Canada
3 May
DCA12:45 p.m.Washington, D.C. Reagan-National
8h 53m
2 stops
YXU9:38 p.m.London
6 May
YXU6:10 p.m.London
4h 18m
1 stop
DCA10:28 p.m.Washington, D.C. Reagan-National
C$ 840
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

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
4 Feb
DCA1:18 p.m.Washington, D.C. Reagan-National
8h 02m
2 stops
YXU9:20 p.m.London
11 Feb
YXU5:10 a.m.London
3h 45m
1 stop
DCA8:55 a.m.Washington, D.C. Reagan-National
C$ 965
Find similar
United Airlines
4 Feb
DCA1:18 p.m.Washington, D.C. Reagan-National
8h 02m
2 stops
YXU9:20 p.m.London
11 Feb
YXU5:40 p.m.London
4h 55m
1 stop
DCA10:35 p.m.Washington, D.C. Reagan-National
C$ 980
Find similar
United Airlines
4 Feb
DCA12:59 p.m.Washington, D.C. Reagan-National
8h 21m
2 stops
YXU9:20 p.m.London
11 Feb
YXU9:25 a.m.London
8h 06m
2 stops
DCA5:31 p.m.Washington, D.C. Reagan-National
C$ 986
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 23 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

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sun 3/5

6:59 a.m.-11:43 a.m.

1 stop4h 44m

London

Wed 6/5

6:10 p.m.-10:28 p.m.

1 stop4h 18m

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.-3:39 p.m.

1 stop6h 14m

C$ 833

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sun 3/5

12:45 p.m.-9:38 p.m.

2 stops8h 53m

London

Wed 6/5

6:10 p.m.-10:28 p.m.

1 stop4h 18m

C$ 840

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

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sun 3/5

12:45 p.m.-9:38 p.m.

2 stops8h 53m

London

Wed 6/5

6:00 a.m.-12:01 p.m.

2 stops6h 01m

C$ 847

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sun 3/5

6:59 a.m.-11:43 a.m.

1 stop4h 44m

London

Wed 6/5

12:20 p.m.-6:13 p.m.

1 stop5h 53m

C$ 848

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Wed 4/2

1:18 p.m.-9:20 p.m.

2 stops8h 02m

London

Wed 11/2

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

1 stop3h 45m

C$ 965

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

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Wed 4/2

1:18 p.m.-9:20 p.m.

2 stops8h 02m

London

Wed 11/2

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

1 stop4h 55m

C$ 980

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. 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

3h 58m

Direct flights

None
The fastest flight from Washington, D.C. to London, Ontario takes 3h 58m
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 3h 58m.

  • 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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