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Cheap flights from London, Ontario to Washington, D.C. from $309

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 9/15. 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 am - 3:24 pm-
5h 19m
Air Canada Logo
9:55 am - 2:50 pm-
4h 55m
$594Air Canada
Thu, Aug 27 - Mon, Aug 31
Air Canada Logo
5:40 am - 3:01 pm-
9h 21m
Air Canada Logo
9:55 am - 2:50 pm-
4h 55m
$597Air Canada
Thu, Aug 27 - Mon, Aug 31
Air Canada Logo
10:05 am - 7:01 pm-
8h 56m
Air Canada Logo
9:45 am - 5:42 pm-
7h 57m
$601Air Canada
Thu, Aug 27 - Mon, Aug 31
Air Canada Logo
10:05 am - 3:24 pm-
5h 19m
Air Canada Logo
4:20 pm - 9:40 pm-
5h 20m
$612Air Canada
Thu, Aug 27 - Sat, Aug 29
Air Canada Logo
10:05 am - 3:24 pm-
5h 19m
Air Canada Logo
4:20 pm - 9:40 pm-
5h 20m
$614Air Canada
Thu, Aug 27 - Sat, Aug 29
Air Canada Logo
10:05 am - 7:01 pm-
8h 56m
Air Canada Logo
4:20 pm - 9:40 pm-
5h 20m
$616Air Canada
Thu, Aug 27 - Sat, Aug 29
Air Canada Logo
10:05 am - 7:01 pm-
8h 56m
Air Canada Logo
4:20 pm - 9:40 pm-
5h 20m
$617Air Canada
Thu, Aug 27 - Sat, Aug 29
Air Canada Logo
10:05 am - 7:01 pm-
8h 56m
Air Canada Logo
9:45 am - 5:42 pm-
7h 57m
$619Air Canada
Thu, Aug 27 - Sat, Aug 29
United Airlines Logo
3:30 pm - 8:25 pm-
4h 55m
United Airlines Logo
6:45 am - 2:50 pm-
8h 05m
$769United Airlines
Fri, Sep 18 - Fri, Sep 25
United Airlines Logo
5:40 am - 1:55 pm-
8h 15m
United Airlines Logo
6:45 am - 2:50 pm-
8h 05m
$775United Airlines
Fri, Sep 18 - Fri, Sep 25

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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
Aug 27
YXU10:05 amLondon
5h 19m
1 stop
IAD3:24 pmWashington, D.C. Dulles Intl
Aug 31
IAD9:55 amWashington, D.C. Dulles Intl
4h 55m
1 stop
YXU2:50 pmLondon
$594
Air Canada
Aug 27
YXU5:40 amLondon
9h 21m
2 stops
IAD3:01 pmWashington, D.C. Dulles Intl
Aug 31
IAD9:55 amWashington, D.C. Dulles Intl
4h 55m
1 stop
YXU2:50 pmLondon
$597
Air Canada
Aug 27
YXU10:05 amLondon
8h 56m
2 stops
IAD7:01 pmWashington, D.C. Dulles Intl
Aug 31
IAD9:45 amWashington, D.C. Dulles Intl
7h 57m
2 stops
YXU5:42 pmLondon
$600

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
Aug 28
YXU10:05 amLondon
11h 15m
2 stops
IAD9:20 pmWashington, D.C. Dulles Intl
Sep 4
IAD4:20 pmWashington, D.C. Dulles Intl
5h 20m
1 stop
YXU9:40 pmLondon
$719
United Airlines
Sep 18
YXU3:30 pmLondon
4h 55m
1 stop
IAD8:25 pmWashington, D.C. Dulles Intl
Sep 25
IAD6:45 amWashington, D.C. Dulles Intl
8h 05m
2 stops
YXU2:50 pmLondon
$769
United Airlines
Aug 28
YXU10:05 amLondon
11h 15m
2 stops
IAD9:20 pmWashington, D.C. Dulles Intl
Sep 4
IAD10:41 pmWashington, D.C. Dulles Intl
16h 09m
2 stops
YXU2:50 pmLondon
$774

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 August 5, 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 8/27

10:05 am-3:24 pm

1 stop5h 19m

Washington, D.C. Dulles Intl

Mon 8/31

9:55 am-2:50 pm

1 stop4h 55m

$594

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 8/27

5:40 am-3:01 pm

2 stops9h 21m

Washington, D.C. Dulles Intl

Mon 8/31

9:55 am-2:50 pm

1 stop4h 55m

$597

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 8/27

10:05 am-7:01 pm

2 stops8h 56m

Washington, D.C. Dulles Intl

Mon 8/31

9:45 am-5:42 pm

2 stops7h 57m

$601

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 8/27

10:05 am-3:24 pm

1 stop5h 19m

Washington, D.C. Dulles Intl

Sat 8/29

4:20 pm-9:40 pm

1 stop5h 20m

$612

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 8/27

10:05 am-3:24 pm

1 stop5h 19m

Washington, D.C. Dulles Intl

Sat 8/29

4:20 pm-9:40 pm

1 stop5h 20m

$614

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 8/27

10:05 am-7:01 pm

2 stops8h 56m

Washington, D.C. Dulles Intl

Sat 8/29

4:20 pm-9:40 pm

1 stop5h 20m

$616

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 8/27

10:05 am-7:01 pm

2 stops8h 56m

Washington, D.C. Dulles Intl

Sat 8/29

4:20 pm-9:40 pm

1 stop5h 20m

$617

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 8/27

10:05 am-7:01 pm

2 stops8h 56m

Washington, D.C. Dulles Intl

Sat 8/29

9:45 am-5:42 pm

2 stops7h 57m

$619

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 9/18

3:30 pm-8:25 pm

1 stop4h 55m

Washington, D.C. Dulles Intl

Fri 9/25

6:45 am-2:50 pm

2 stops8h 05m

$769

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 9/18

5:40 am-1:55 pm

2 stops8h 15m

Washington, D.C. Dulles Intl

Fri 9/25

6:45 am-2:50 pm

2 stops8h 05m

$775

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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

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?

    Washington, D.C. Dulles Intl is 341.3 mi away from London. Flights usually cover this in 4h 17m, 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
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Silver Spring
Towson
Sterling
Colonial Beach
Springfield
Fairfax
Tysons
Edgewood

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.

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