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Cheap flights from London, Ontario to Washington, D.C. from C$ 433

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London, Ontario to Washington, D.C. departing on 15/9. 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 London, Ontario to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
Air Canada Logo
9:55 a.m. - 2:50 p.m.
IAD
-
YXU
4h 55m
1 stop
C$ 832Air Canada
Thu, 27 Aug - Mon, 31 Aug
Air Canada Logo
5:40 a.m. - 3:01 p.m.
YXU
-
IAD
9h 21m
2 stops
Air Canada Logo
9:55 a.m. - 2:50 p.m.
IAD
-
YXU
4h 55m
1 stop
C$ 836Air Canada
Thu, 27 Aug - Mon, 31 Aug
Air Canada Logo
10:05 a.m. - 7:01 p.m.
YXU
-
IAD
8h 56m
2 stops
Air Canada Logo
9:45 a.m. - 5:42 p.m.
IAD
-
YXU
7h 57m
2 stops
C$ 841Air Canada
Thu, 27 Aug - Mon, 31 Aug
Air Canada Logo
10:05 a.m. - 7:01 p.m.
YXU
-
IAD
8h 56m
2 stops
Air Canada Logo
9:45 a.m. - 5:42 p.m.
IAD
-
YXU
7h 57m
2 stops
C$ 842Air Canada
Thu, 27 Aug - Mon, 31 Aug
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
Air Canada Logo
4:20 p.m. - 9:40 p.m.
IAD
-
YXU
5h 20m
1 stop
C$ 860Air Canada
Thu, 27 Aug - Sat, 29 Aug
Air Canada Logo
10:05 a.m. - 7:01 p.m.
YXU
-
IAD
8h 56m
2 stops
Air Canada Logo
4:20 p.m. - 9:40 p.m.
IAD
-
YXU
5h 20m
1 stop
C$ 864Air Canada
Thu, 27 Aug - Sat, 29 Aug
WestJet Logo
8:40 p.m. - 6:10 p.m.
YXU
-
IAD
21h 30m
1 stop
WestJet Logo
7:00 p.m. - 5:20 a.m.
IAD
-
YXU
10h 20m
1 stop
C$ 898WestJet
Thu, 27 Aug - Mon, 31 Aug
United Airlines Logo
10:05 a.m. - 9:20 p.m.
YXU
-
IAD
11h 15m
2 stops
United Airlines Logo
4:20 p.m. - 9:40 p.m.
IAD
-
YXU
5h 20m
1 stop
C$ 1,007United Airlines
Fri, 28 Aug - Fri, 4 Sep
United Airlines Logo
10:05 a.m. - 9:20 p.m.
YXU
-
IAD
11h 15m
2 stops
United Airlines Logo
10:41 p.m. - 2:50 p.m.
IAD
-
YXU
16h 09m
2 stops
C$ 1,084United Airlines
Fri, 28 Aug - Fri, 4 Sep
United Airlines Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
United Airlines Logo
8:20 a.m. - 9:40 p.m.
IAD
-
YXU
13h 20m
2 stops
C$ 1,108United Airlines
Sat, 15 Aug - Mon, 17 Aug

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

Our best Air Canada deals on London, Ontario to Washington, D.C. Dulles Intl Airport flight tickets
Air Canada
27 Aug
YXU10:05 a.m.London
5h 19m
1 stop
IAD3:24 p.m.Washington, D.C. Dulles Intl
31 Aug
IAD9:55 a.m.Washington, D.C. Dulles Intl
4h 55m
1 stop
YXU2:50 p.m.London
C$ 832
Air Canada
27 Aug
YXU5:40 a.m.London
9h 21m
2 stops
IAD3:01 p.m.Washington, D.C. Dulles Intl
31 Aug
IAD9:55 a.m.Washington, D.C. Dulles Intl
4h 55m
1 stop
YXU2:50 p.m.London
C$ 836
Air Canada
27 Aug
YXU10:05 a.m.London
8h 56m
2 stops
IAD7:01 p.m.Washington, D.C. Dulles Intl
31 Aug
IAD9:45 a.m.Washington, D.C. Dulles Intl
7h 57m
2 stops
YXU5:42 p.m.London
C$ 841

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

Our best United Airlines deals on London, Ontario to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
28 Aug
YXU10:05 a.m.London
11h 15m
2 stops
IAD9:20 p.m.Washington, D.C. Dulles Intl
4 Sep
IAD4:20 p.m.Washington, D.C. Dulles Intl
5h 20m
1 stop
YXU9:40 p.m.London
C$ 1,007
United Airlines
28 Aug
YXU10:05 a.m.London
11h 15m
2 stops
IAD9:20 p.m.Washington, D.C. Dulles Intl
4 Sep
IAD10:41 p.m.Washington, D.C. Dulles Intl
16h 09m
2 stops
YXU2:50 p.m.London
C$ 1,084
United Airlines
15 Aug
YXU10:05 a.m.London
5h 19m
1 stop
IAD3:24 p.m.Washington, D.C. Dulles Intl
17 Aug
IAD8:20 a.m.Washington, D.C. Dulles Intl
13h 20m
2 stops
YXU9:40 p.m.London
C$ 1,108

momondo Fare Finder

 
Customize your flight search to find flights from London, Ontario to Washington, D.C. Dulles Intl Airport 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 3 August 2026.
Use the filters below to find and compare flights from London, Ontario to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 27/8

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Mon 31/8

9:55 a.m.-2:50 p.m.

1 stop4h 55m

C$ 832

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 27/8

5:40 a.m.-3:01 p.m.

2 stops9h 21m

Washington, D.C. Dulles Intl

Mon 31/8

9:55 a.m.-2:50 p.m.

1 stop4h 55m

C$ 836

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 27/8

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

2 stops8h 56m

Washington, D.C. Dulles Intl

Mon 31/8

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

2 stops7h 57m

C$ 841

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 27/8

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

2 stops8h 56m

Washington, D.C. Dulles Intl

Mon 31/8

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

2 stops7h 57m

C$ 842

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 27/8

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Sat 29/8

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

1 stop5h 20m

C$ 860

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 27/8

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

2 stops8h 56m

Washington, D.C. Dulles Intl

Sat 29/8

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

1 stop5h 20m

C$ 864

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 27/8

8:40 p.m.-6:10 p.m.

1 stop21h 30m

Washington, D.C. Dulles Intl

Mon 31/8

7:00 p.m.-5:20 a.m.

1 stop10h 20m

C$ 898

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 28/8

10:05 a.m.-9:20 p.m.

2 stops11h 15m

Washington, D.C. Dulles Intl

Fri 4/9

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

1 stop5h 20m

C$ 1,007

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 28/8

10:05 a.m.-9:20 p.m.

2 stops11h 15m

Washington, D.C. Dulles Intl

Fri 4/9

10:41 p.m.-2:50 p.m.

2 stops16h 09m

C$ 1,084

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 15/8

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Mon 17/8

8:20 a.m.-9:40 p.m.

2 stops13h 20m

C$ 1,108

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from London, Ontario to Washington, D.C. Dulles Intl Airport

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 London to Washington, D.C. Dulles Intl?

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

Which airlines fly to Washington, D.C. Dulles Intl Airport?

Air Canada, United Airlines and Porter Airlines are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from London, Ontario according to our data. Air Canada is the first choice among our users, with 67% of people opting to fly with this airline when travelling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 3 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

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

Are you open to changing your travel dates? Check out the ideal times to fly from London, Ontario to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London, Ontario to Washington, D.C. Dulles Intl Airport (YXU to IAD) flight deals and tips

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

Fastest flight time

4h 17m

Direct flights

None
The fastest flight from London, Ontario to Washington, D.C. Dulles Intl Airport takes 4h 17m
There are no direct flights from London, Ontario to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London, Ontario to Washington, D.C. Dulles Intl Airport.
Search flight deals

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

  • How far is London to Washington, D.C. Dulles Intl by plane?

    The distance between London and Washington, D.C. Dulles Intl is about 549.2 km. 4h 17m is a normal flight duration for this route.

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

    Prices for flights from London Airport to Washington, D.C. Dulles Intl Airport refresh daily.

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

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Sterling
Alexandria
Gettysburg
Gaithersburg
Chantilly
Arlington
Fairfax
National Harbor
Winchester
Fredericksburg
Ashburn
Herndon
Woodbridge
Silver Spring
Leesburg
Falls Church
Rockville
McLean
Tysons

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington, D.C.?

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 Washington, D.C. from London.

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

momondo does allow users to show only those flights to Washington, D.C. from London which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for London to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from London to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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