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Cheap flights from London, Ontario to Washington, D.C. from $255

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 12/14. 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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0 bags

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Air Canada Logo
9:25 am - 7:40 pmYXU-IAD
10h 15m2 stops
Air Canada Logo
9:55 am - 5:03 pmIAD-YXU
7h 08m2 stops
$469Air Canada
Find Deal
Fri, Apr 24 - Tue, Apr 28
Air Canada Logo
9:25 am - 8:50 pmYXU-IAD
11h 25m2 stops
Air Canada Logo
9:55 am - 5:03 pmIAD-YXU
7h 08m2 stops
$470Air Canada
Find Deal
Fri, Apr 24 - Tue, Apr 28
Air Canada Logo
9:25 am - 3:39 pmYXU-IAD
6h 14m1 stop
Air Canada Logo
9:00 am - 5:03 pmIAD-YXU
8h 03m1 stop
$504Air Canada
Find Deal
Fri, Apr 24 - Tue, Apr 28
Air Canada Logo
5:10 am - 3:55 pmYXU-IAD
10h 45m1 stop
Air Canada Logo
4:30 pm - 9:18 pmIAD-YXU
4h 48m1 stop
$506Air Canada
Find Deal
Fri, Apr 24 - Tue, Apr 28
United Airlines Logo
9:25 am - 3:46 pmYXU-IAD
6h 21m1 stop
United Airlines Logo
4:30 pm - 9:21 pmIAD-YXU
4h 51m1 stop
$553United Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
United Airlines Logo
5:15 am - 4:58 pmYXU-IAD
11h 43m2 stops
United Airlines Logo
8:45 am - 5:05 pmIAD-YXU
8h 20m2 stops
$559United Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4

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
Nov 27
YXU9:25 amLondon
6h 21m
1 stop
IAD3:46 pmWashington, D.C. Dulles Intl
Dec 4
IAD4:30 pmWashington, D.C. Dulles Intl
4h 51m
1 stop
YXU9:21 pmLondon
$553
Find similar
United Airlines
Nov 27
YXU5:15 amLondon
11h 43m
2 stops
IAD4:58 pmWashington, D.C. Dulles Intl
Dec 4
IAD8:45 amWashington, D.C. Dulles Intl
8h 20m
2 stops
YXU5:05 pmLondon
$559
Find similar
United Airlines
Nov 4
YXU9:25 amLondon
6h 21m
1 stop
IAD3:46 pmWashington, D.C. Dulles Intl
Nov 11
IAD1:00 pmWashington, D.C. Dulles Intl
8h 21m
2 stops
YXU9:21 pmLondon
$826
Find similar

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
Apr 24
YXU9:25 amLondon
10h 15m
2 stops
IAD7:40 pmWashington, D.C. Dulles Intl
Apr 28
IAD9:55 amWashington, D.C. Dulles Intl
7h 08m
2 stops
YXU5:03 pmLondon
$469
Find similar
Air Canada
Apr 24
YXU9:25 amLondon
11h 25m
2 stops
IAD8:50 pmWashington, D.C. Dulles Intl
Apr 28
IAD9:55 amWashington, D.C. Dulles Intl
7h 08m
2 stops
YXU5:03 pmLondon
$470
Find similar
Air Canada
Apr 24
YXU9:25 amLondon
6h 14m
1 stop
IAD3:39 pmWashington, D.C. Dulles Intl
Apr 28
IAD9:00 amWashington, D.C. Dulles Intl
8h 03m
1 stop
YXU5:03 pmLondon
$504
Find similar

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 832,500 searches. Data last updated October 31, 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

Fri 4/24

9:25 am-7:40 pm

2 stops10h 15m

Washington, D.C. Dulles Intl

Tue 4/28

9:55 am-5:03 pm

2 stops7h 08m

$469

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 4/24

9:25 am-8:50 pm

2 stops11h 25m

Washington, D.C. Dulles Intl

Tue 4/28

9:55 am-5:03 pm

2 stops7h 08m

$470

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 4/24

9:25 am-3:39 pm

1 stop6h 14m

Washington, D.C. Dulles Intl

Tue 4/28

9:00 am-5:03 pm

1 stop8h 03m

$504

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 4/24

5:10 am-3:55 pm

1 stop10h 45m

Washington, D.C. Dulles Intl

Tue 4/28

4:30 pm-9:18 pm

1 stop4h 48m

$506

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 11/27

9:25 am-3:46 pm

1 stop6h 21m

Washington, D.C. Dulles Intl

Thu 12/4

4:30 pm-9:21 pm

1 stop4h 51m

$553

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 11/27

5:15 am-4:58 pm

2 stops11h 43m

Washington, D.C. Dulles Intl

Thu 12/4

8:45 am-5:05 pm

2 stops8h 20m

$559

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sun 12/14

9:25 am-3:46 pm

1 stop6h 21m

$255

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sun 12/14

9:25 am-11:21 pm

2 stops13h 56m

$327

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sun 12/14

5:10 am-11:45 am

1 stop6h 35m

$367

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sun 12/14

8:10 pm-2:29 pm

3 stops42h 19m

$426

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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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

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?

    Washington, D.C. Dulles Intl is 341.3 mi away from London. Flights usually cover this in 6h 14m, depending on flying conditions and air traffic around both airports.

  • 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 are refreshed on a daily basis.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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 travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl 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 Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Manassas
Reston
Gaithersburg
Fairfax
Sterling

Why use momondo?

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

Finding the right flight to Washington, D.C. from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Washington, D.C. from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of London to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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

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