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Cheap flights from Washington, D.C. to London from C$ 350

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 13/2. 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. - 3:46 p.m.
YXU
-
IAD
6h 21m
1 stop
C$ 680Air Canada
Thu, 5 Mar - Sat, 7 Mar
Air Canada Logo
9:40 a.m. - 5:05 p.m.
DCA
-
YXU
7h 25m
1 stop
Air Canada Logo
5:40 p.m. - 10:35 p.m.
YXU
-
DCA
4h 55m
1 stop
C$ 711Air Canada
Thu, 5 Mar - Sat, 7 Mar
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$ 740Air 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$ 747Air Canada
Wed, 18 Feb - Thu, 19 Feb
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$ 752Air 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
5:10 a.m. - 12:19 p.m.
YXU
-
DCA
7h 09m
2 stops
C$ 755Air 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
5:10 a.m. - 8:55 a.m.
YXU
-
DCA
3h 45m
1 stop
C$ 873United Airlines
Wed, 28 Jan - Sat, 31 Jan
United Airlines Logo
1:05 p.m. - 9:21 p.m.
IAD
-
YXU
8h 16m
2 stops
United Airlines Logo
9:50 a.m. - 3:46 p.m.
YXU
-
IAD
5h 56m
1 stop
C$ 873United Airlines
Wed, 28 Jan - Sat, 31 Jan
United Airlines Logo
7:00 a.m. - 5:05 p.m.
DCA
-
YXU
10h 05m
2 stops
United Airlines Logo
9:25 a.m. - 5:33 p.m.
YXU
-
DCA
8h 08m
2 stops
C$ 894United Airlines
Sat, 28 Feb - Sat, 7 Mar
WestJet Logo
12:24 p.m. - 6:35 a.m.
IAD
-
YXU
18h 11m
2 stops
WestJet Logo
8:10 p.m. - 2:45 p.m.
YXU
-
IAD
18h 35m
2 stops
C$ 2,161WestJet
Thu, 26 Feb - Thu, 5 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
5 Mar
IAD4:30 p.m.Washington, D.C. Dulles Intl
4h 51m
1 stop
YXU9:21 p.m.London
7 Mar
YXU9:25 a.m.London
6h 21m
1 stop
IAD3:46 p.m.Washington, D.C. Dulles Intl
C$ 680
Air Canada
5 Mar
DCA9:40 a.m.Washington, D.C. Reagan-National
7h 25m
1 stop
YXU5:05 p.m.London
7 Mar
YXU5:40 p.m.London
4h 55m
1 stop
DCA10:35 p.m.Washington, D.C. Reagan-National
C$ 711
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$ 740

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
28 Jan
DCA7:00 a.m.Washington, D.C. Reagan-National
10h 05m
2 stops
YXU5:05 p.m.London
31 Jan
YXU5:10 a.m.London
3h 45m
1 stop
DCA8:55 a.m.Washington, D.C. Reagan-National
C$ 873
United Airlines
28 Feb
DCA7:00 a.m.Washington, D.C. Reagan-National
10h 05m
2 stops
YXU5:05 p.m.London
7 Mar
YXU9:25 a.m.London
8h 08m
2 stops
DCA5:33 p.m.Washington, D.C. Reagan-National
C$ 894
United Airlines
29 Jan
IAD8:29 a.m.Washington, D.C. Dulles Intl
8h 36m
2 stops
YXU5:05 p.m.London
2 Feb
YXU9:50 a.m.London
7h 45m
2 stops
IAD5:35 p.m.Washington, D.C. Dulles Intl
C$ 1,013

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 14 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

Thu 5/3

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

1 stop4h 51m

London

Sat 7/3

9:25 a.m.-3:46 p.m.

1 stop6h 21m

C$ 680

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

Sat 7/3

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

1 stop4h 55m

C$ 711

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$ 740

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$ 747

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$ 752

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

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

2 stops7h 09m

C$ 755

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Wed 28/1

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

2 stops10h 05m

London

Sat 31/1

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

1 stop3h 45m

C$ 873

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 28/1

1:05 p.m.-9:21 p.m.

2 stops8h 16m

London

Sat 31/1

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

1 stop5h 56m

C$ 873

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sat 28/2

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

2 stops10h 05m

London

Sat 7/3

9:25 a.m.-5:33 p.m.

2 stops8h 08m

C$ 894

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 26/2

12:24 p.m.-6:35 a.m.

2 stops18h 11m

London

Thu 5/3

8:10 p.m.-2:45 p.m.

2 stops18h 35m

C$ 2,161

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 is the most popular carrier 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 72% 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 51m

Direct flights

None
The fastest flight from Washington, D.C. to London, Ontario takes 4h 51m
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 51m.

  • 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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