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Cheap flights from London, Ontario to Washington, D.C. from $280

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 10/31. 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 am - 1:38 pmYXU-IAD
7h 23m1 stop
Air Canada Logo
4:25 pm - 9:21 pmIAD-YXU
4h 56m1 stop
$479Air Canada
Find Deal
Sat, Oct 18 - Sat, Nov 8
Air Canada Logo
6:15 am - 1:38 pmYXU-IAD
7h 23m1 stop
Air Canada Logo
9:45 am - 5:05 pmIAD-YXU
7h 20m2 stops
$484Air Canada
Find Deal
Sat, Oct 18 - Sat, Nov 8
United Airlines Logo
6:15 am - 5:37 pmYXU-IAD
11h 22m2 stops
United Airlines Logo
8:30 am - 9:21 pmIAD-YXU
12h 51m2 stops
$524United Airlines
Find Deal
Sat, Oct 18 - Sat, Nov 8
Multiple Airlines Logo
6:00 am - 7:26 pmYXU-IAD
13h 26m2 stops
Multiple Airlines Logo
6:13 pm - 7:12 pmIAD-YXU
48h 59m3 stops
$1,554Multiple Airlines
Find Deal
Sat, Oct 18 - Sat, Nov 8

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
Oct 18
YXU6:15 amLondon
7h 23m
1 stop
IAD1:38 pmWashington, D.C. Dulles Intl
Nov 8
IAD4:25 pmWashington, D.C. Dulles Intl
4h 56m
1 stop
YXU9:21 pmLondon
$479
Find similar
Air Canada
Oct 18
YXU6:15 amLondon
7h 23m
1 stop
IAD1:38 pmWashington, D.C. Dulles Intl
Nov 8
IAD9:45 amWashington, D.C. Dulles Intl
7h 20m
2 stops
YXU5:05 pmLondon
$484
Find similar
Air Canada
Sep 19
YXU3:50 pmLondon
5h 35m
1 stop
IAD9:25 pmWashington, D.C. Dulles Intl
Sep 26
IAD10:20 amWashington, D.C. Dulles Intl
4h 57m
1 stop
YXU3:17 pmLondon
$1,234
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
Oct 18
YXU6:15 amLondon
11h 22m
2 stops
IAD5:37 pmWashington, D.C. Dulles Intl
Nov 8
IAD8:30 amWashington, D.C. Dulles Intl
12h 51m
2 stops
YXU9:21 pmLondon
$524
Find similar
United Airlines
Sep 20
YXU3:50 pmLondon
5h 35m
1 stop
IAD9:25 pmWashington, D.C. Dulles Intl
Sep 24
IAD6:20 amWashington, D.C. Dulles Intl
8h 57m
2 stops
YXU3:17 pmLondon
$1,016
Find similar
United Airlines
Sep 20
YXU6:10 amLondon
8h 27m
2 stops
IAD2:37 pmWashington, D.C. Dulles Intl
Sep 24
IAD6:20 amWashington, D.C. Dulles Intl
8h 57m
2 stops
YXU3:17 pmLondon
$1,021
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 September 17, 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 10/18

6:15 am-1:38 pm

1 stop7h 23m

Washington, D.C. Dulles Intl

Sat 11/8

4:25 pm-9:21 pm

1 stop4h 56m

$479

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 10/18

6:15 am-1:38 pm

1 stop7h 23m

Washington, D.C. Dulles Intl

Sat 11/8

9:45 am-5:05 pm

2 stops7h 20m

$484

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 10/18

6:15 am-5:37 pm

2 stops11h 22m

Washington, D.C. Dulles Intl

Sat 11/8

8:30 am-9:21 pm

2 stops12h 51m

$524

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 10/18

6:00 am-7:26 pm

2 stops13h 26m

Washington, D.C. Dulles Intl

Sat 11/8

6:13 pm-7:12 pm

3 stops48h 59m

$1,554

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 10/31

5:40 pm-9:20 pm

1 stop3h 40m

$280

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 10/31

9:25 am-11:59 pm

2 stops14h 34m

$321

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 9/24

8:00 pm-9:17 am

3 stops37h 17m

$386

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 9/24

6:10 am-11:45 am

1 stop5h 35m

$400

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 9/24

6:10 am-12:32 am

2 stops18h 22m

$405

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 10/31

8:10 pm-11:55 pm

3 stops27h 45m

$580

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

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 7h 23m, 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
Gettysburg
National Harbor
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Manassas
Reston
Fairfax
Glen Burnie
Gaithersburg

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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