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Cheap flights from Washington, D.C. Dulles Intl Airport to London from C$ 575

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. Dulles Intl Airport to London departing on 26/8. 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. Dulles Intl Airport to London

Cheap round-trip flights

Air Canada Logo
10:20 a.m. - 3:17 p.m.IAD-YXU
4h 57m1 stop
Air Canada Logo
10:00 a.m. - 1:38 p.m.YXU-IAD
3h 38m1 stop
C$ 982Air Canada
Find Deal
Sat, 13 Sep - Sat, 20 Sep
United Airlines Logo
10:14 p.m. - 5:07 p.m.IAD-YXU
18h 53m2 stops
United Airlines Logo
6:15 a.m. - 5:22 a.m.YXU-IAD
23h 07m2 stops
C$ 1,083United Airlines
Find Deal
Tue, 19 Aug - Sat, 23 Aug
United Airlines Logo
5:47 p.m. - 3:17 p.m.IAD-YXU
21h 30m2 stops
United Airlines Logo
3:50 p.m. - 5:22 a.m.YXU-IAD
13h 32m2 stops
C$ 1,161United Airlines
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Air Canada Logo
1:15 p.m. - 9:29 p.m.IAD-YXU
8h 14m2 stops
Air Canada Logo
10:00 a.m. - 1:38 p.m.YXU-IAD
3h 38m1 stop
C$ 1,167Air Canada
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Logo
3:41 p.m. - 9:27 p.m.IAD-YXU
5h 46m1 stop
Logo
9:55 a.m. - 1:42 p.m.YXU-IAD
3h 47m1 stop
C$ 1,178
Find Deal
Tue, 19 Aug - Sat, 23 Aug
Logo
6:20 a.m. - 3:02 p.m.IAD-YXU
8h 42m2 stops
Logo
9:55 a.m. - 1:42 p.m.YXU-IAD
3h 47m1 stop
C$ 1,384
Find Deal
Tue, 19 Aug - Sat, 23 Aug
Logo
1:00 p.m. - 5:14 a.m.IAD-YXU
16h 14m2 stops
Logo
6:00 a.m. - 11:07 a.m.YXU-IAD
29h 07m3 stops
C$ 1,393
Find Deal
Tue, 19 Aug - Sat, 23 Aug
Logo
4:10 p.m. - 7:09 p.m.IAD-YXU
26h 59m3 stops
Logo
8:00 p.m. - 2:56 p.m.YXU-IAD
18h 56m3 stops
C$ 1,971
Find Deal
Tue, 19 Aug - Sat, 23 Aug
Logo
6:00 a.m. - 5:12 a.m.IAD-YXU
23h 12m3 stops
Logo
6:00 a.m. - 3:06 p.m.YXU-IAD
33h 06m3 stops
C$ 2,032
Find Deal
Sat, 13 Sep - Sat, 20 Sep

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

Our best Air Canada deals on Washington, D.C. Dulles Intl Airport to London, Ontario flight tickets
Air Canada
13 Sep
IAD10:20 a.m.Washington, D.C. Dulles Intl
4h 57m
1 stop
YXU3:17 p.m.London
20 Sep
YXU10:00 a.m.London
3h 38m
1 stop
IAD1:38 p.m.Washington, D.C. Dulles Intl
C$ 982
Find similar
Air Canada
13 Sep
IAD1:15 p.m.Washington, D.C. Dulles Intl
8h 14m
2 stops
YXU9:29 p.m.London
20 Sep
YXU10:00 a.m.London
3h 38m
1 stop
IAD1:38 p.m.Washington, D.C. Dulles Intl
C$ 1,167
Find similar
Air Canada
1 Aug
IAD10:20 a.m.Washington, D.C. Dulles Intl
4h 42m
1 stop
YXU3:02 p.m.London
6 Aug
YXU3:40 p.m.London
5h 45m
1 stop
IAD9:25 p.m.Washington, D.C. Dulles Intl
C$ 1,821
Find similar

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

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to London, Ontario flight tickets
United Airlines
19 Aug
IAD10:14 p.m.Washington, D.C. Dulles Intl
18h 53m
2 stops
YXU5:07 p.m.London
23 Aug
YXU6:15 a.m.London
23h 07m
2 stops
IAD5:22 a.m.Washington, D.C. Dulles Intl
C$ 1,083
Find similar
United Airlines
13 Sep
IAD5:47 p.m.Washington, D.C. Dulles Intl
21h 30m
2 stops
YXU3:17 p.m.London
20 Sep
YXU3:50 p.m.London
13h 32m
2 stops
IAD5:22 a.m.Washington, D.C. Dulles Intl
C$ 1,161
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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 31 July 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport 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

Sat 13/9

10:20 a.m.-3:17 p.m.

1 stop4h 57m

London

Sat 20/9

10:00 a.m.-1:38 p.m.

1 stop3h 38m

C$ 982

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Tue 19/8

10:14 p.m.-5:07 p.m.

2 stops18h 53m

London

Sat 23/8

6:15 a.m.-5:22 a.m.

2 stops23h 07m

C$ 1,083

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 13/9

5:47 p.m.-3:17 p.m.

2 stops21h 30m

London

Sat 20/9

3:50 p.m.-5:22 a.m.

2 stops13h 32m

C$ 1,161

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 13/9

1:15 p.m.-9:29 p.m.

2 stops8h 14m

London

Sat 20/9

10:00 a.m.-1:38 p.m.

1 stop3h 38m

C$ 1,167

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Tue 19/8

3:41 p.m.-9:27 p.m.

1 stop5h 46m

London

Sat 23/8

9:55 a.m.-1:42 p.m.

1 stop3h 47m

C$ 1,178

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Tue 19/8

6:20 a.m.-3:02 p.m.

2 stops8h 42m

London

Sat 23/8

9:55 a.m.-1:42 p.m.

1 stop3h 47m

C$ 1,384

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Tue 19/8

1:00 p.m.-5:14 a.m.

2 stops16h 14m

London

Sat 23/8

6:00 a.m.-11:07 a.m.

3 stops29h 07m

C$ 1,393

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Tue 19/8

4:10 p.m.-7:09 p.m.

3 stops26h 59m

London

Sat 23/8

8:00 p.m.-2:56 p.m.

3 stops18h 56m

C$ 1,971

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 13/9

6:00 a.m.-5:12 a.m.

3 stops23h 12m

London

Sat 20/9

6:00 a.m.-3:06 p.m.

3 stops33h 06m

C$ 2,032

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Tue 26/8

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

1 stop4h 42m

C$ 575

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. Dulles Intl Airport 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. Dulles Intl to London?

Air Canada and United Airlines are the most popular carriers operating from Washington, D.C. Dulles Intl to London

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

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

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

Best price found

C$ 575

Fastest flight time

4h 42m

Direct flights

None

Airports in London, Ontario

1 airport
The best one-way flight to London, Ontario from Washington, D.C. Dulles Intl Airport in the past 72 hours is C$ 575. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to London, Ontario found on momondo in the last 72 hours is C$ 982.
The fastest flight from Washington, D.C. Dulles Intl Airport to London, Ontario takes 4h 42m
There are no direct flights from Washington, D.C. Dulles Intl Airport to London, Ontario. Popular non-direct route for this connection is Washington, D.C. Dulles Intl Airport - London Airport.
There is 1 airport near London, Ontario: London (YXU)
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  • How far is Washington, D.C. Dulles Intl to London by plane?

    The distance between Washington, D.C. Dulles Intl and London is about 549.2 km. A reasonable flight in good conditions will take 4h 57m.

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

    Prices for flights from Washington, D.C. Dulles Intl Airport to London Airport were last updated today.

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

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

    The travel and health documents you'll need for your trip to London Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to London for you.

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

Yes. momondo allows you to filter the results for Washington, D.C. to London flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Washington, D.C..

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

Price alerts on flights to London from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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