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Cheap flights from London, Ontario to Washington, D.C. from $635

This is the cheapest round-trip 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 9/8. 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
5:40 am - 12:00 pm
YXU
-
DCA
6h 20m
2 stops
Air Canada Logo
12:40 pm - 9:40 pm
DCA
-
YXU
9h 00m
2 stops
$635Air Canada
Tue, Sep 8 - Sat, Sep 12
Air Canada Logo
10:05 am - 3:24 pm
YXU
-
IAD
5h 19m
1 stop
Air Canada Logo
9:55 am - 2:50 pm
IAD
-
YXU
4h 55m
1 stop
$635Air Canada
Wed, Sep 2 - Sun, Sep 6
Air Canada Logo
6:20 pm - 10:31 pm
YXU
-
DCA
4h 11m
1 stop
Air Canada Logo
12:40 pm - 9:40 pm
DCA
-
YXU
9h 00m
2 stops
$636Air Canada
Thu, Aug 27 - Mon, Aug 31
Air Canada Logo
10:05 am - 3:24 pm
YXU
-
IAD
5h 19m
1 stop
Air Canada Logo
9:55 am - 2:50 pm
IAD
-
YXU
4h 55m
1 stop
$636Air Canada
Thu, Aug 27 - Mon, Aug 31
Air Canada Logo
5:40 am - 2:55 pm
YXU
-
IAD
9h 15m
2 stops
Air Canada Logo
4:20 pm - 9:40 pm
IAD
-
YXU
5h 20m
1 stop
$638Air Canada
Wed, Sep 2 - Sun, Sep 6
Air Canada Logo
5:40 am - 3:01 pm
YXU
-
IAD
9h 21m
2 stops
Air Canada Logo
9:55 am - 2:50 pm
IAD
-
YXU
4h 55m
1 stop
$639Air Canada
Thu, Aug 27 - Mon, Aug 31
United Airlines Logo
3:30 pm - 7:57 pm
YXU
-
DCA
4h 27m
1 stop
United Airlines Logo
11:57 am - 9:40 pm
DCA
-
YXU
9h 43m
2 stops
$711United Airlines
Wed, Sep 2 - Wed, Sep 9
United Airlines Logo
5:40 am - 11:21 am
YXU
-
IAD
5h 41m
1 stop
United Airlines Logo
10:41 am - 9:40 pm
IAD
-
YXU
10h 59m
2 stops
$711United Airlines
Wed, Sep 2 - Wed, Sep 9
United Airlines Logo
5:40 am - 2:24 pm
YXU
-
DCA
8h 44m
2 stops
United Airlines Logo
11:57 am - 9:40 pm
DCA
-
YXU
9h 43m
2 stops
$716United Airlines
Wed, Sep 2 - Wed, Sep 9
Multiple Airlines Logo
6:10 am - 3:10 pm
YXU
-
IAD
33h 00m
3 stops
Multiple Airlines Logo
11:25 am - 5:20 am
IAD
-
YXU
17h 55m
3 stops
$891Multiple Airlines
Wed, Sep 2 - Wed, Sep 9

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Air Canada flights from London, Ontario to Washington, D.C.

Our best Air Canada deals on London, Ontario to Washington, D.C. 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
$635
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
$636
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
$638

United Airlines flights from London, Ontario to Washington, D.C.

Our best United Airlines deals on London, Ontario to Washington, D.C. flight tickets
United Airlines
Sep 2
YXU5:40 amLondon
5h 41m
1 stop
IAD11:21 amWashington, D.C. Dulles Intl
Sep 9
IAD10:41 amWashington, D.C. Dulles Intl
10h 59m
2 stops
YXU9:40 pmLondon
$711
United Airlines
Sep 3
YXU3:30 pmLondon
7h 29m
2 stops
IAD10:59 pmWashington, D.C. Dulles Intl
Sep 10
IAD6:15 amWashington, D.C. Dulles Intl
8h 35m
2 stops
YXU2:50 pmLondon
$716
United Airlines
Aug 27
YXU5:40 amLondon
8h 18m
2 stops
BWI1:58 pmBaltimore/Washington
Aug 31
BWI6:05 amBaltimore/Washington
15h 35m
2 stops
YXU9:40 pmLondon
$738

momondo Fare Finder

 
Customize your flight search to find flights from London, Ontario to Washington, D.C. 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 July 20, 2026.
Use the filters below to find and compare flights from London, Ontario to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Tue 9/8

5:40 am-12:00 pm

2 stops6h 20m

Washington, D.C. Reagan-National

Sat 9/12

12:40 pm-9:40 pm

2 stops9h 00m

$635
Quickest round-trip

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 9/2

10:05 am-3:24 pm

1 stop5h 19m

Washington, D.C. Dulles Intl

Sun 9/6

9:55 am-2:50 pm

1 stop4h 55m

$635

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Thu 8/27

6:20 pm-10:31 pm

1 stop4h 11m

Washington, D.C. Reagan-National

Mon 8/31

12:40 pm-9:40 pm

2 stops9h 00m

$636

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

$636

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 9/2

5:40 am-2:55 pm

2 stops9h 15m

Washington, D.C. Dulles Intl

Sun 9/6

4:20 pm-9:40 pm

1 stop5h 20m

$638

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

$639

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Wed 9/2

3:30 pm-7:57 pm

1 stop4h 27m

Washington, D.C. Reagan-National

Wed 9/9

11:57 am-9:40 pm

2 stops9h 43m

$711

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 9/2

5:40 am-11:21 am

1 stop5h 41m

Washington, D.C. Dulles Intl

Wed 9/9

10:41 am-9:40 pm

2 stops10h 59m

$711

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Wed 9/2

5:40 am-2:24 pm

2 stops8h 44m

Washington, D.C. Reagan-National

Wed 9/9

11:57 am-9:40 pm

2 stops9h 43m

$716

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 9/2

6:10 am-3:10 pm

3 stops33h 00m

Washington, D.C. Dulles Intl

Wed 9/9

11:25 am-5:20 am

3 stops17h 55m

$891

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.

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 airlines fly to Washington, D.C.?

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Washington, D.C. from London, Ontario according to our data. Air Canada is the first choice among our users, with 68% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 6 different airlines that fly to Washington, D.C. 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.

Are you open to changing your travel dates? Check out the ideal times to fly from London, Ontario to Washington, D.C. 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. (YXU to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London, Ontario to Washington, D.C.

Fastest flight time

4h 11m

Direct flights

None
The fastest flight from London, Ontario to Washington, D.C. takes 4h 11m
There are no direct flights from London, Ontario to Washington, D.C.. There are no popular flight routes from London, Ontario to Washington, D.C..
Search flight deals

Frequently asked questions about flying from London, Ontario to Washington, D.C.

  • How far is London to Washington, D.C. by plane?

    The distance between London and Washington, D.C. is about 356.5 mi. Flights usually cover this in 4h 11m, 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.?

    Prices for flights from London Airport to Washington, D.C. are refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The required travel and health documents for your Washington, D.C. 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.. We recommend that you seek guidance from your airline or a reliable 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
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Manassas
Towson
Silver Spring
Colonial Beach
Springfield
Tysons
Fairfax
College Park
Edgewood

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?

Yes. momondo enables you to select and highlight flights to Washington, D.C. from London with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Washington, D.C..

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

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport