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Cheap flights from Washington, D.C. Dulles Intl Airport to London from C$ 861

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. Dulles Intl Airport to London departing on 13/7. 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
1 adult, Economy, 0 bags

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:45 p.m. - 5:20 a.m.
IAD
-
YXU
13h 35m
2 stops
Multiple Airlines Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
C$ 861Multiple Airlines
Mon, 13 Jul - Sun, 19 Jul
Air Canada Logo
4:20 p.m. - 8:32 p.m.
IAD
-
YXU
4h 12m
1 stop
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
C$ 867Air Canada
Mon, 13 Jul - Sun, 19 Jul
Air Canada Logo
9:55 a.m. - 2:55 p.m.
IAD
-
YXU
5h 00m
1 stop
Air Canada Logo
3:30 p.m. - 8:25 p.m.
YXU
-
IAD
4h 55m
1 stop
C$ 985Air Canada
Fri, 9 Oct - Mon, 12 Oct
Air Canada Logo
9:45 a.m. - 5:42 p.m.
IAD
-
YXU
7h 57m
2 stops
Air Canada Logo
10:05 a.m. - 7:01 p.m.
YXU
-
IAD
8h 56m
2 stops
C$ 992Air Canada
Mon, 13 Jul - Sun, 19 Jul
Air Canada Logo
9:55 a.m. - 2:55 p.m.
IAD
-
YXU
5h 00m
1 stop
Air Canada Logo
5:40 a.m. - 3:00 p.m.
YXU
-
IAD
9h 20m
2 stops
C$ 998Air Canada
Wed, 9 Sep - Fri, 11 Sep
Air Canada Logo
9:45 a.m. - 5:43 p.m.
IAD
-
YXU
7h 58m
2 stops
Air Canada Logo
10:05 a.m. - 7:00 p.m.
YXU
-
IAD
8h 55m
2 stops
C$ 1,009Air Canada
Wed, 9 Sep - Fri, 11 Sep
Air Canada Logo
9:55 a.m. - 2:52 p.m.
IAD
-
YXU
4h 57m
1 stop
Air Canada Logo
3:30 p.m. - 8:24 p.m.
YXU
-
IAD
4h 54m
1 stop
C$ 1,034Air Canada
Sat, 4 Jul - Fri, 10 Jul
Air Canada Logo
9:45 a.m. - 5:42 p.m.
IAD
-
YXU
7h 57m
2 stops
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
C$ 1,045Air Canada
Sat, 4 Jul - Fri, 10 Jul
Air Canada Logo
9:55 a.m. - 2:55 p.m.
IAD
-
YXU
5h 00m
1 stop
Air Canada Logo
5:40 a.m. - 3:00 p.m.
YXU
-
IAD
9h 20m
2 stops
C$ 1,118Air Canada
Fri, 9 Oct - Mon, 12 Oct
Air Canada Logo
4:20 p.m. - 9:40 p.m.
IAD
-
YXU
5h 20m
1 stop
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
C$ 1,129Air Canada
Thu, 2 Jul - Sun, 5 Jul

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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
9 Oct
IAD10:40 p.m.Washington, D.C. Dulles Intl
16h 15m
2 stops
YXU2:55 p.m.London
12 Oct
YXU10:05 a.m.London
12h 54m
2 stops
IAD10:59 p.m.Washington, D.C. Dulles Intl
C$ 1,171
United Airlines
29 Jul
IAD9:55 a.m.Washington, D.C. Dulles Intl
4h 57m
1 stop
YXU2:52 p.m.London
5 Aug
YXU3:30 p.m.London
4h 54m
1 stop
IAD8:24 p.m.Washington, D.C. Dulles Intl
C$ 1,184
United Airlines
14 Jul
IAD8:15 a.m.Washington, D.C. Dulles Intl
12h 17m
2 stops
YXU8:32 p.m.London
18 Jul
YXU3:30 p.m.London
5h 56m
1 stop
IAD9:26 p.m.Washington, D.C. Dulles Intl
C$ 1,198

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 Jul
IAD4:20 p.m.Washington, D.C. Dulles Intl
4h 12m
1 stop
YXU8:32 p.m.London
19 Jul
YXU10:05 a.m.London
5h 19m
1 stop
IAD3:24 p.m.Washington, D.C. Dulles Intl
C$ 867
Air Canada
9 Oct
IAD9:55 a.m.Washington, D.C. Dulles Intl
5h 00m
1 stop
YXU2:55 p.m.London
12 Oct
YXU3:30 p.m.London
4h 55m
1 stop
IAD8:25 p.m.Washington, D.C. Dulles Intl
C$ 985
Air Canada
13 Jul
IAD9:45 a.m.Washington, D.C. Dulles Intl
7h 57m
2 stops
YXU5:42 p.m.London
19 Jul
YXU10:05 a.m.London
8h 56m
2 stops
IAD7:01 p.m.Washington, D.C. Dulles Intl
C$ 992

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 16 June 2026.
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

Cheapest round-trip

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 13/7

3:45 p.m.-5:20 a.m.

2 stops13h 35m

London

Sun 19/7

10:05 a.m.-3:24 p.m.

1 stop5h 19m

C$ 861
Quickest round-trip

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 13/7

4:20 p.m.-8:32 p.m.

1 stop4h 12m

London

Sun 19/7

10:05 a.m.-3:24 p.m.

1 stop5h 19m

C$ 867

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 9/10

9:55 a.m.-2:55 p.m.

1 stop5h 00m

London

Mon 12/10

3:30 p.m.-8:25 p.m.

1 stop4h 55m

C$ 985

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 13/7

9:45 a.m.-5:42 p.m.

2 stops7h 57m

London

Sun 19/7

10:05 a.m.-7:01 p.m.

2 stops8h 56m

C$ 992

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 9/9

9:55 a.m.-2:55 p.m.

1 stop5h 00m

London

Fri 11/9

5:40 a.m.-3:00 p.m.

2 stops9h 20m

C$ 998

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 9/9

9:45 a.m.-5:43 p.m.

2 stops7h 58m

London

Fri 11/9

10:05 a.m.-7:00 p.m.

2 stops8h 55m

C$ 1,009

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 4/7

9:55 a.m.-2:52 p.m.

1 stop4h 57m

London

Fri 10/7

3:30 p.m.-8:24 p.m.

1 stop4h 54m

C$ 1,034

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 4/7

9:45 a.m.-5:42 p.m.

2 stops7h 57m

London

Fri 10/7

10:05 a.m.-3:24 p.m.

1 stop5h 19m

C$ 1,045

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 9/10

9:55 a.m.-2:55 p.m.

1 stop5h 00m

London

Mon 12/10

5:40 a.m.-3:00 p.m.

2 stops9h 20m

C$ 1,118

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 2/7

4:20 p.m.-9:40 p.m.

1 stop5h 20m

London

Sun 5/7

10:05 a.m.-3:24 p.m.

1 stop5h 19m

C$ 1,129

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Fastest flight time

4h 12m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to London, Ontario takes 4h 12m
There are no direct flights from Washington, D.C. Dulles Intl Airport to London, Ontario. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to London, Ontario.
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Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to London, Ontario

  • 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 12m.

  • 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.

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to London, Ontario

  • How do I get Price Alerts for flights from Washington, D.C. Dulles Intl Airport to London, Ontario?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Washington, D.C. Dulles Intl Airport from London, Ontario. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Washington, D.C. Dulles Intl Airport to London, Ontario with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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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..

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