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Cheap flights from London, Ontario to Washington, D.C. from C$ 403

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 18/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
3:30 p.m. - 8:24 p.m.
YXU
-
IAD
4h 54m
1 stop
Air Canada Logo
4:20 p.m. - 9:40 p.m.
IAD
-
YXU
5h 20m
1 stop
C$ 713Air Canada
Tue, 25 Aug - Wed, 26 Aug
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
Air Canada Logo
9:45 a.m. - 5:45 p.m.
IAD
-
YXU
8h 00m
2 stops
C$ 717Air Canada
Tue, 25 Aug - Wed, 26 Aug
Air Canada Logo
5:40 a.m. - 3:01 p.m.
YXU
-
IAD
9h 21m
2 stops
Air Canada Logo
9:45 a.m. - 5:45 p.m.
IAD
-
YXU
8h 00m
2 stops
C$ 721Air Canada
Tue, 25 Aug - Wed, 26 Aug
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
Air Canada Logo
9:55 a.m. - 2:55 p.m.
IAD
-
YXU
5h 00m
1 stop
C$ 747Air Canada
Tue, 25 Aug - Wed, 26 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$ 751Air Canada
Tue, 25 Aug - Wed, 26 Aug
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
Air Canada Logo
9:45 a.m. - 5:45 p.m.
IAD
-
YXU
8h 00m
2 stops
C$ 752Air Canada
Tue, 25 Aug - Wed, 26 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. - 5:45 p.m.
IAD
-
YXU
8h 00m
2 stops
C$ 755Air Canada
Tue, 25 Aug - Wed, 26 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. - 5:45 p.m.
IAD
-
YXU
8h 00m
2 stops
C$ 756Air Canada
Tue, 25 Aug - Wed, 26 Aug
Air Canada Logo
10:05 a.m. - 3:29 p.m.
YXU
-
IAD
5h 24m
1 stop
Air Canada Logo
9:55 a.m. - 2:57 p.m.
IAD
-
YXU
5h 02m
1 stop
C$ 781Air Canada
Sun, 14 Jun - Sun, 21 Jun
Air Canada Logo
10:05 a.m. - 3:24 p.m.
YXU
-
IAD
5h 19m
1 stop
Air Canada Logo
9:55 a.m. - 2:55 p.m.
IAD
-
YXU
5h 00m
1 stop
C$ 804Air Canada
Tue, 25 Aug - Wed, 26 Aug

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
25 Aug
YXU3:30 p.m.London
4h 54m
1 stop
IAD8:24 p.m.Washington, D.C. Dulles Intl
26 Aug
IAD4:20 p.m.Washington, D.C. Dulles Intl
5h 20m
1 stop
YXU9:40 p.m.London
C$ 713
Air Canada
25 Aug
YXU10:05 a.m.London
5h 19m
1 stop
IAD3:24 p.m.Washington, D.C. Dulles Intl
26 Aug
IAD9:45 a.m.Washington, D.C. Dulles Intl
8h 00m
2 stops
YXU5:45 p.m.London
C$ 717
Air Canada
25 Aug
YXU5:40 a.m.London
9h 21m
2 stops
IAD3:01 p.m.Washington, D.C. Dulles Intl
26 Aug
IAD9:45 a.m.Washington, D.C. Dulles Intl
8h 00m
2 stops
YXU5:45 p.m.London
C$ 721

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
14 Jun
YXU5:10 a.m.London
18h 09m
2 stops
IAD11:19 p.m.Washington, D.C. Dulles Intl
21 Jun
IAD10:31 a.m.Washington, D.C. Dulles Intl
11h 06m
2 stops
YXU9:37 p.m.London
C$ 956
United Airlines
15 May
YXU12:20 p.m.London
3h 49m
1 stop
IAD4:09 p.m.Washington, D.C. Dulles Intl
17 May
IAD6:00 a.m.Washington, D.C. Dulles Intl
11h 33m
2 stops
YXU5:33 p.m.London
C$ 986
United Airlines
15 May
YXU9:30 a.m.London
8h 00m
2 stops
IAD5:30 p.m.Washington, D.C. Dulles Intl
17 May
IAD8:20 a.m.Washington, D.C. Dulles Intl
9h 13m
2 stops
YXU5:33 p.m.London
C$ 1,278

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 5 May 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

Tue 25/8

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

1 stop4h 54m

Washington, D.C. Dulles Intl

Wed 26/8

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

1 stop5h 20m

C$ 713

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 25/8

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Wed 26/8

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

2 stops8h 00m

C$ 717

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 25/8

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

2 stops9h 21m

Washington, D.C. Dulles Intl

Wed 26/8

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

2 stops8h 00m

C$ 721

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 25/8

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Wed 26/8

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

1 stop5h 00m

C$ 747

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 25/8

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

2 stops8h 56m

Washington, D.C. Dulles Intl

Wed 26/8

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

1 stop5h 20m

C$ 751

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 25/8

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Wed 26/8

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

2 stops8h 00m

C$ 752

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 25/8

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

2 stops8h 56m

Washington, D.C. Dulles Intl

Wed 26/8

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

2 stops8h 00m

C$ 755

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 25/8

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

2 stops8h 56m

Washington, D.C. Dulles Intl

Wed 26/8

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

2 stops8h 00m

C$ 756

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sun 14/6

10:05 a.m.-3:29 p.m.

1 stop5h 24m

Washington, D.C. Dulles Intl

Sun 21/6

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

1 stop5h 02m

C$ 781

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 25/8

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Wed 26/8

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

1 stop5h 00m

C$ 804

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest 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 66% 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

5h 19m

Direct flights

None
The fastest flight from London, Ontario to Washington, D.C. Dulles Intl Airport takes 5h 19m
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. 5h 19m 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
Chantilly
Fairfax
Gaithersburg
Linthicum Heights
Bethesda
National Harbor
Reston
Laurel
Herndon
Winchester
Arlington
Fredericksburg
Ashburn
Leesburg
Manassas
Woodbridge
Silver Spring
Sterling

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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