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Cheap flights from London, Ontario to Washington, D.C. from C$ 422

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 27/9. 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.
WestJet Logo
6:10 a.m. - 6:10 p.m.
YXU
-
IAD
12h 00m
1 stop
WestJet Logo
7:00 p.m. - 5:20 a.m.
IAD
-
YXU
10h 20m
1 stop
C$ 561WestJet
Fri, 28 Aug - Mon, 31 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. - 2:52 p.m.
IAD
-
YXU
4h 57m
1 stop
C$ 728Air Canada
Thu, 23 Jul - Wed, 29 Jul
Air Canada Logo
5:40 a.m. - 3:01 p.m.
YXU
-
IAD
9h 21m
2 stops
Air Canada Logo
9:45 a.m. - 5:42 p.m.
IAD
-
YXU
7h 57m
2 stops
C$ 736Air Canada
Wed, 5 Aug - Wed, 12 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. - 2:50 p.m.
IAD
-
YXU
4h 55m
1 stop
C$ 740Air Canada
Wed, 5 Aug - Wed, 12 Aug
Multiple Airlines Logo
6:10 a.m. - 6:10 p.m.
YXU
-
IAD
12h 00m
1 stop
Multiple Airlines Logo
8:39 p.m. - 7:50 p.m.
IAD
-
YXU
23h 11m
2 stops
C$ 742Multiple Airlines
Fri, 28 Aug - Mon, 31 Aug
Air Canada Logo
5:40 a.m. - 12:00 p.m.
YXU
-
DCA
6h 20m
2 stops
Air Canada Logo
12:40 p.m. - 9:40 p.m.
DCA
-
YXU
9h 00m
2 stops
C$ 744Air Canada
Tue, 11 Aug - Fri, 14 Aug
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$ 744Air Canada
Tue, 11 Aug - Fri, 14 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. - 5:42 p.m.
IAD
-
YXU
7h 57m
2 stops
C$ 746Air Canada
Wed, 5 Aug - Wed, 12 Aug
United Airlines Logo
10:05 a.m. - 6:42 p.m.
YXU
-
BWI
8h 37m
2 stops
United Airlines Logo
10:25 a.m. - 9:40 p.m.
BWI
-
YXU
11h 15m
2 stops
C$ 920United Airlines
Tue, 11 Aug - Fri, 14 Aug
United Airlines Logo
5:40 a.m. - 9:29 p.m.
YXU
-
BWI
15h 49m
2 stops
United Airlines Logo
10:25 a.m. - 9:40 p.m.
BWI
-
YXU
11h 15m
2 stops
C$ 923United Airlines
Tue, 11 Aug - Sat, 15 Aug

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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
23 Jul
YXU10:05 a.m.London
5h 19m
1 stop
IAD3:24 p.m.Washington, D.C. Dulles Intl
29 Jul
IAD9:55 a.m.Washington, D.C. Dulles Intl
4h 57m
1 stop
YXU2:52 p.m.London
C$ 728
Air Canada
5 Aug
YXU5:40 a.m.London
9h 21m
2 stops
IAD3:01 p.m.Washington, D.C. Dulles Intl
12 Aug
IAD9:45 a.m.Washington, D.C. Dulles Intl
7h 57m
2 stops
YXU5:42 p.m.London
C$ 736
Air Canada
5 Aug
YXU10:05 a.m.London
5h 19m
1 stop
IAD3:24 p.m.Washington, D.C. Dulles Intl
12 Aug
IAD9:55 a.m.Washington, D.C. Dulles Intl
4h 55m
1 stop
YXU2:50 p.m.London
C$ 740

WestJet flights from London, Ontario to Washington, D.C.

Our best WestJet deals on London, Ontario to Washington, D.C. flight tickets
WestJet
28 Aug
YXU6:10 a.m.London
12h 00m
1 stop
IAD6:10 p.m.Washington, D.C. Dulles Intl
31 Aug
IAD7:00 p.m.Washington, D.C. Dulles Intl
10h 20m
1 stop
YXU5:20 a.m.London
C$ 560
WestJet
11 Aug
YXU2:40 p.m.London
8h 41m
2 stops
IAD11:21 p.m.Washington, D.C. Dulles Intl
15 Aug
IAD12:30 p.m.Washington, D.C. Dulles Intl
16h 50m
2 stops
YXU5:20 a.m.London
C$ 1,238
WestJet
5 Aug
YXU6:10 a.m.London
15h 03m
2 stops
BWI9:13 p.m.Baltimore/Washington
12 Aug
BWI1:45 p.m.Baltimore/Washington
15h 35m
2 stops
YXU5:20 a.m.London
C$ 1,649

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 96,600 searches. Data last updated 12 July 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 - IAD

YXUIAD

London

Fri 28/8

6:10 a.m.-6:10 p.m.

1 stop12h 00m

Washington, D.C. Dulles Intl

Mon 31/8

7:00 p.m.-5:20 a.m.

1 stop10h 20m

C$ 560

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 23/7

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Wed 29/7

9:55 a.m.-2:52 p.m.

1 stop4h 57m

C$ 728

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 5/8

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

2 stops9h 21m

Washington, D.C. Dulles Intl

Wed 12/8

9:45 a.m.-5:42 p.m.

2 stops7h 57m

C$ 736
Quickest round-trip

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 5/8

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Wed 12/8

9:55 a.m.-2:50 p.m.

1 stop4h 55m

C$ 740

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 28/8

6:10 a.m.-6:10 p.m.

1 stop12h 00m

Washington, D.C. Dulles Intl

Mon 31/8

8:39 p.m.-7:50 p.m.

2 stops23h 11m

C$ 742

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Tue 11/8

5:40 a.m.-12:00 p.m.

2 stops6h 20m

Washington, D.C. Reagan-National

Fri 14/8

12:40 p.m.-9:40 p.m.

2 stops9h 00m

C$ 744

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 11/8

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

1 stop4h 54m

Washington, D.C. Dulles Intl

Fri 14/8

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

1 stop5h 20m

C$ 744

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 5/8

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

1 stop5h 19m

Washington, D.C. Dulles Intl

Wed 12/8

9:45 a.m.-5:42 p.m.

2 stops7h 57m

C$ 746

LondonBaltimore

YXU - BWI

YXUBWI

London

Tue 11/8

10:05 a.m.-6:42 p.m.

2 stops8h 37m

Baltimore/Washington

Fri 14/8

10:25 a.m.-9:40 p.m.

2 stops11h 15m

C$ 920

LondonBaltimore

YXU - BWI

YXUBWI

London

Tue 11/8

5:40 a.m.-9:29 p.m.

2 stops15h 49m

Baltimore/Washington

Sat 15/8

10:25 a.m.-9:40 p.m.

2 stops11h 15m

C$ 923

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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.

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

Can stopping save me money on London, Ontario to Washington, D.C. flights?

You could potentially save up to 57% on your flight if you consider stops on a London, Ontario to Washington, D.C. flight.

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 29m

Direct flights

None
The fastest flight from London, Ontario to Washington, D.C. takes 4h 29m
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..
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Frequently asked questions about flying from London, Ontario to Washington, D.C.

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

    London and Washington, D.C. are 573.8 km apart from one another. A reasonable flight in good conditions will take 4h 29m.

  • 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. refresh daily.

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

    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..

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

    The travel and health documents required for your trip to Washington, D.C. can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C.. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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
Fairfax
Arlington
Gaithersburg
Linthicum Heights
National Harbor
Herndon
Fredericksburg
Manassas
Woodbridge
Silver Spring
Falls Church
Rockville
McLean
Tysons

Why use momondo?

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

It is quick and easy to find London to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

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

All flight searches from London to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Washington, D.C. from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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 36.1 km from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport