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Cheap flights from London, Ontario to Washington, D.C. from C$ 385

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 31/10. 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 London, Ontario to Washington, D.C.

Cheap round-trip flights

Air Canada Logo
6:15 a.m. - 1:38 p.m.YXU-IAD
7h 23m1 stop
Air Canada Logo
4:25 p.m. - 9:21 p.m.IAD-YXU
4h 56m1 stop
C$ 659Air Canada
Find Deal
Sat, 18 Oct - Sat, 8 Nov
Air Canada Logo
6:15 a.m. - 1:38 p.m.YXU-IAD
7h 23m1 stop
Air Canada Logo
9:45 a.m. - 5:05 p.m.IAD-YXU
7h 20m2 stops
C$ 666Air Canada
Find Deal
Sat, 18 Oct - Sat, 8 Nov
United Airlines Logo
6:15 a.m. - 5:37 p.m.YXU-IAD
11h 22m2 stops
United Airlines Logo
8:30 a.m. - 9:21 p.m.IAD-YXU
12h 51m2 stops
C$ 721United Airlines
Find Deal
Sat, 18 Oct - Sat, 8 Nov
Multiple Airlines Logo
6:00 a.m. - 7:26 p.m.YXU-IAD
13h 26m2 stops
Multiple Airlines Logo
6:13 p.m. - 7:12 p.m.IAD-YXU
48h 59m3 stops
C$ 2,138Multiple Airlines
Find Deal
Sat, 18 Oct - Sat, 8 Nov

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
18 Oct
YXU6:15 a.m.London
7h 23m
1 stop
IAD1:38 p.m.Washington, D.C. Dulles Intl
8 Nov
IAD4:25 p.m.Washington, D.C. Dulles Intl
4h 56m
1 stop
YXU9:21 p.m.London
C$ 659
Find similar
Air Canada
18 Oct
YXU6:15 a.m.London
7h 23m
1 stop
IAD1:38 p.m.Washington, D.C. Dulles Intl
8 Nov
IAD9:45 a.m.Washington, D.C. Dulles Intl
7h 20m
2 stops
YXU5:05 p.m.London
C$ 666
Find similar
Air Canada
19 Sep
YXU3:50 p.m.London
5h 35m
1 stop
IAD9:25 p.m.Washington, D.C. Dulles Intl
26 Sep
IAD10:20 a.m.Washington, D.C. Dulles Intl
4h 57m
1 stop
YXU3:17 p.m.London
C$ 1,698
Find similar

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
18 Oct
YXU6:15 a.m.London
11h 22m
2 stops
IAD5:37 p.m.Washington, D.C. Dulles Intl
8 Nov
IAD8:30 a.m.Washington, D.C. Dulles Intl
12h 51m
2 stops
YXU9:21 p.m.London
C$ 721
Find similar
United Airlines
20 Sep
YXU3:50 p.m.London
5h 35m
1 stop
IAD9:25 p.m.Washington, D.C. Dulles Intl
24 Sep
IAD6:20 a.m.Washington, D.C. Dulles Intl
8h 57m
2 stops
YXU3:17 p.m.London
C$ 1,398
Find similar
United Airlines
20 Sep
YXU6:10 a.m.London
8h 27m
2 stops
IAD2:37 p.m.Washington, D.C. Dulles Intl
24 Sep
IAD6:20 a.m.Washington, D.C. Dulles Intl
8h 57m
2 stops
YXU3:17 p.m.London
C$ 1,405
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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 17 September 2025.
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

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 18/10

6:15 a.m.-1:38 p.m.

1 stop7h 23m

Washington, D.C. Dulles Intl

Sat 8/11

4:25 p.m.-9:21 p.m.

1 stop4h 56m

C$ 659

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 18/10

6:15 a.m.-1:38 p.m.

1 stop7h 23m

Washington, D.C. Dulles Intl

Sat 8/11

9:45 a.m.-5:05 p.m.

2 stops7h 20m

C$ 666

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 18/10

6:15 a.m.-5:37 p.m.

2 stops11h 22m

Washington, D.C. Dulles Intl

Sat 8/11

8:30 a.m.-9:21 p.m.

2 stops12h 51m

C$ 721

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 18/10

6:00 a.m.-7:26 p.m.

2 stops13h 26m

Washington, D.C. Dulles Intl

Sat 8/11

6:13 p.m.-7:12 p.m.

3 stops48h 59m

C$ 2,138

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 31/10

5:40 p.m.-9:20 p.m.

1 stop3h 40m

C$ 385

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 31/10

9:25 a.m.-11:59 p.m.

2 stops14h 34m

C$ 442

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 24/9

8:00 p.m.-9:17 a.m.

3 stops37h 17m

C$ 531

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 24/9

6:10 a.m.-11:45 a.m.

1 stop5h 35m

C$ 550

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 24/9

6:10 a.m.-12:32 a.m.

2 stops18h 22m

C$ 557

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 31/10

8:10 p.m.-11:55 p.m.

3 stops27h 45m

C$ 798

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 77% of people opting to fly with this airline when travelling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 5 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

Direct flights

None
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.
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  • 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. 7h 23m 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
Alexandria
Gettysburg
Linthicum Heights
Bethesda
Silver Spring
Herndon
Reston
Fairfax
Laurel
Chantilly
Capitol Heights
Winchester
Arlington
Manassas
Fredericksburg
Ashburn
Woodbridge
Rockville
McLean
National Harbor

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.

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

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