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Cheap flights from Washington, D.C. Dulles Intl Airport to London from C$ 775

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 26/6. 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

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.
Air Canada Logo
9:55 a.m. - 2:57 p.m.
IAD
-
YXU
5h 02m
1 stop
Air Canada Logo
10:05 a.m. - 4:12 p.m.
YXU
-
IAD
6h 07m
1 stop
C$ 775Air Canada
Fri, 26 Jun - Sun, 28 Jun
Air Canada Logo
4:00 p.m. - 9:40 p.m.
IAD
-
YXU
5h 40m
1 stop
Air Canada Logo
10:05 a.m. - 3:25 p.m.
YXU
-
IAD
5h 20m
1 stop
C$ 853Air Canada
Thu, 17 Sep - Mon, 21 Sep
Air Canada Logo
4:20 p.m. - 9:40 p.m.
IAD
-
YXU
5h 20m
1 stop
Air Canada Logo
3:30 p.m. - 8:24 p.m.
YXU
-
IAD
4h 54m
1 stop
C$ 863Air Canada
Sat, 4 Jul - Mon, 6 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. - 8:24 p.m.
YXU
-
IAD
4h 54m
1 stop
C$ 878Air Canada
Mon, 20 Jul - Thu, 23 Jul
Air Canada Logo
9:55 a.m. - 2:55 p.m.
IAD
-
YXU
5h 00m
1 stop
Air Canada Logo
10:05 a.m. - 7:01 p.m.
YXU
-
IAD
8h 56m
2 stops
C$ 889Air Canada
Mon, 20 Jul - Thu, 23 Jul
Air Canada Logo
4:05 p.m. - 9:38 p.m.
IAD
-
YXU
5h 33m
1 stop
Air Canada Logo
9:30 a.m. - 3:29 p.m.
YXU
-
IAD
5h 59m
1 stop
C$ 893Air Canada
Wed, 27 May - Thu, 28 May
Air Canada Logo
9:45 a.m. - 5:45 p.m.
IAD
-
YXU
8h 00m
2 stops
Air Canada Logo
5:10 a.m. - 3:01 p.m.
YXU
-
IAD
9h 51m
2 stops
C$ 902Air Canada
Mon, 20 Jul - Thu, 23 Jul
Air Canada Logo
4:05 p.m. - 9:38 p.m.
IAD
-
YXU
5h 33m
1 stop
Air Canada Logo
9:30 a.m. - 6:58 p.m.
YXU
-
IAD
9h 28m
2 stops
C$ 904Air Canada
Wed, 27 May - Thu, 28 May
Air Canada Logo
9:45 a.m. - 5:33 p.m.
IAD
-
YXU
7h 48m
2 stops
Air Canada Logo
9:30 a.m. - 6:58 p.m.
YXU
-
IAD
9h 28m
2 stops
C$ 917Air Canada
Wed, 27 May - Thu, 28 May
Air Canada Logo
4:05 p.m. - 9:38 p.m.
IAD
-
YXU
5h 33m
1 stop
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
C$ 937Air Canada
Sun, 14 Jun - Tue, 30 Jun

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

Our best WestJet deals on Washington, D.C. Dulles Intl Airport to London, Ontario flight tickets
WestJet
29 May
IAD7:00 p.m.Washington, D.C. Dulles Intl
21h 45m
1 stop
YXU4:45 p.m.London
31 May
YXU5:55 p.m.London
24h 15m
1 stop
IAD6:10 p.m.Washington, D.C. Dulles Intl
C$ 1,438
WestJet
29 May
IAD11:15 a.m.Washington, D.C. Dulles Intl
29h 30m
2 stops
YXU4:45 p.m.London
31 May
YXU2:40 p.m.London
32h 59m
2 stops
IAD11:39 p.m.Washington, D.C. Dulles Intl
C$ 1,676
WestJet
29 May
IAD7:00 p.m.Washington, D.C. Dulles Intl
21h 45m
1 stop
YXU4:45 p.m.London
31 May
YXU2:40 p.m.London
32h 59m
2 stops
IAD11:39 p.m.Washington, D.C. Dulles Intl
C$ 1,682

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
17 Sep
IAD6:15 a.m.Washington, D.C. Dulles Intl
8h 40m
2 stops
YXU2:55 p.m.London
21 Sep
YXU10:05 a.m.London
5h 20m
1 stop
IAD3:25 p.m.Washington, D.C. Dulles Intl
C$ 997
United Airlines
4 Jul
IAD6:33 a.m.Washington, D.C. Dulles Intl
8h 22m
2 stops
YXU2:55 p.m.London
6 Jul
YXU3:30 p.m.London
4h 54m
1 stop
IAD8:24 p.m.Washington, D.C. Dulles Intl
C$ 999
United Airlines
17 Sep
IAD6:15 a.m.Washington, D.C. Dulles Intl
8h 40m
2 stops
YXU2:55 p.m.London
21 Sep
YXU3:30 p.m.London
7h 29m
2 stops
IAD10:59 p.m.Washington, D.C. Dulles Intl
C$ 1,018

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 1 May 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

Fri 26/6

9:55 a.m.-2:57 p.m.

1 stop5h 02m

London

Sun 28/6

10:05 a.m.-4:12 p.m.

1 stop6h 07m

C$ 775

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 17/9

4:00 p.m.-9:40 p.m.

1 stop5h 40m

London

Mon 21/9

10:05 a.m.-3:25 p.m.

1 stop5h 20m

C$ 853

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 4/7

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

1 stop5h 20m

London

Mon 6/7

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

1 stop4h 54m

C$ 863
Quickest round-trip

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 20/7

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

1 stop5h 00m

London

Thu 23/7

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

1 stop4h 54m

C$ 878

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 20/7

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

1 stop5h 00m

London

Thu 23/7

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

2 stops8h 56m

C$ 889

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 27/5

4:05 p.m.-9:38 p.m.

1 stop5h 33m

London

Thu 28/5

9:30 a.m.-3:29 p.m.

1 stop5h 59m

C$ 893

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 20/7

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

2 stops8h 00m

London

Thu 23/7

5:10 a.m.-3:01 p.m.

2 stops9h 51m

C$ 902

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 27/5

4:05 p.m.-9:38 p.m.

1 stop5h 33m

London

Thu 28/5

9:30 a.m.-6:58 p.m.

2 stops9h 28m

C$ 904

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 27/5

9:45 a.m.-5:33 p.m.

2 stops7h 48m

London

Thu 28/5

9:30 a.m.-6:58 p.m.

2 stops9h 28m

C$ 917

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sun 14/6

4:05 p.m.-9:38 p.m.

1 stop5h 33m

London

Tue 30/6

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

1 stop5h 19m

C$ 937

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 21m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to London, Ontario takes 4h 21m
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.
Search flight deals

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 21m.

  • 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?

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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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