Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London, Ontario to Washington, D.C. from C$ 356

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 28/4. 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

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
9:30 a.m. - 3:29 p.m.
YXU
-
IAD
5h 59m
1 stop
Air Canada Logo
4:05 p.m. - 9:38 p.m.
IAD
-
YXU
5h 33m
1 stop
C$ 737Air Canada
Wed, 6 May - Fri, 8 May
Air Canada Logo
9:30 a.m. - 6:58 p.m.
YXU
-
IAD
9h 28m
2 stops
Air Canada Logo
4:05 p.m. - 9:38 p.m.
IAD
-
YXU
5h 33m
1 stop
C$ 741Air Canada
Wed, 6 May - Fri, 8 May
Air Canada Logo
9:30 a.m. - 3:29 p.m.
YXU
-
IAD
5h 59m
1 stop
Air Canada Logo
4:05 p.m. - 9:38 p.m.
IAD
-
YXU
5h 33m
1 stop
C$ 753Air Canada
Wed, 6 May - Fri, 8 May
Air Canada Logo
9:30 a.m. - 6:58 p.m.
YXU
-
IAD
9h 28m
2 stops
Air Canada Logo
4:05 p.m. - 9:38 p.m.
IAD
-
YXU
5h 33m
1 stop
C$ 757Air Canada
Wed, 6 May - Fri, 8 May
Air Canada Logo
9:30 a.m. - 3:29 p.m.
YXU
-
IAD
5h 59m
1 stop
Air Canada Logo
9:55 a.m. - 9:38 p.m.
IAD
-
YXU
11h 43m
1 stop
C$ 769Air Canada
Wed, 6 May - Fri, 8 May
Air Canada Logo
12:20 p.m. - 6:58 p.m.
YXU
-
IAD
6h 38m
2 stops
Air Canada Logo
3:45 p.m. - 8:53 a.m.
IAD
-
YXU
17h 08m
2 stops
C$ 771Air Canada
Wed, 6 May - Fri, 8 May
Air Canada Logo
5:40 a.m. - 3:03 p.m.
YXU
-
IAD
9h 23m
2 stops
Air Canada Logo
9:55 a.m. - 9:38 p.m.
IAD
-
YXU
11h 43m
1 stop
C$ 774Air Canada
Wed, 6 May - Fri, 8 May
Air Canada Logo
9:30 a.m. - 3:29 p.m.
YXU
-
IAD
5h 59m
1 stop
Air Canada Logo
3:45 p.m. - 8:53 a.m.
IAD
-
YXU
17h 08m
2 stops
C$ 783Air Canada
Wed, 6 May - Fri, 8 May
Air Canada Logo
9:30 a.m. - 6:58 p.m.
YXU
-
IAD
9h 28m
2 stops
Air Canada Logo
3:45 p.m. - 8:53 a.m.
IAD
-
YXU
17h 08m
2 stops
C$ 786Air Canada
Wed, 6 May - Fri, 8 May
Air Canada Logo
12:20 p.m. - 6:58 p.m.
YXU
-
IAD
6h 38m
2 stops
Air Canada Logo
3:45 p.m. - 8:53 a.m.
IAD
-
YXU
17h 08m
2 stops
C$ 787Air Canada
Wed, 6 May - Fri, 8 May

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
26 Apr
YXU5:40 p.m.London
3h 45m
1 stop
IAD9:25 p.m.Washington, D.C. Dulles Intl
3 May
IAD4:05 p.m.Washington, D.C. Dulles Intl
5h 33m
1 stop
YXU9:38 p.m.London
C$ 832
United Airlines
10 Apr
YXU9:25 a.m.London
11h 39m
2 stops
IAD9:04 p.m.Washington, D.C. Dulles Intl
11 Apr
IAD10:10 a.m.Washington, D.C. Dulles Intl
11h 09m
2 stops
YXU9:19 p.m.London
C$ 886

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
6 May
YXU9:30 a.m.London
5h 59m
1 stop
IAD3:29 p.m.Washington, D.C. Dulles Intl
8 May
IAD4:05 p.m.Washington, D.C. Dulles Intl
5h 33m
1 stop
YXU9:38 p.m.London
C$ 737
Air Canada
6 May
YXU9:30 a.m.London
9h 28m
2 stops
IAD6:58 p.m.Washington, D.C. Dulles Intl
8 May
IAD4:05 p.m.Washington, D.C. Dulles Intl
5h 33m
1 stop
YXU9:38 p.m.London
C$ 741
Air Canada
6 May
YXU9:30 a.m.London
5h 59m
1 stop
IAD3:29 p.m.Washington, D.C. Dulles Intl
8 May
IAD4:05 p.m.Washington, D.C. Dulles Intl
5h 33m
1 stop
YXU9:38 p.m.London
C$ 753

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 96,600 searches. Data last updated 17 March 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

Wed 6/5

9:30 a.m.-3:29 p.m.

1 stop5h 59m

Washington, D.C. Dulles Intl

Fri 8/5

4:05 p.m.-9:38 p.m.

1 stop5h 33m

C$ 737

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 6/5

9:30 a.m.-6:58 p.m.

2 stops9h 28m

Washington, D.C. Dulles Intl

Fri 8/5

4:05 p.m.-9:38 p.m.

1 stop5h 33m

C$ 741

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 6/5

9:30 a.m.-3:29 p.m.

1 stop5h 59m

Washington, D.C. Dulles Intl

Fri 8/5

4:05 p.m.-9:38 p.m.

1 stop5h 33m

C$ 753

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 6/5

9:30 a.m.-6:58 p.m.

2 stops9h 28m

Washington, D.C. Dulles Intl

Fri 8/5

4:05 p.m.-9:38 p.m.

1 stop5h 33m

C$ 757

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 6/5

9:30 a.m.-3:29 p.m.

1 stop5h 59m

Washington, D.C. Dulles Intl

Fri 8/5

9:55 a.m.-9:38 p.m.

1 stop11h 43m

C$ 769

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 6/5

12:20 p.m.-6:58 p.m.

2 stops6h 38m

Washington, D.C. Dulles Intl

Fri 8/5

3:45 p.m.-8:53 a.m.

2 stops17h 08m

C$ 771

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 6/5

5:40 a.m.-3:03 p.m.

2 stops9h 23m

Washington, D.C. Dulles Intl

Fri 8/5

9:55 a.m.-9:38 p.m.

1 stop11h 43m

C$ 774

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 6/5

9:30 a.m.-3:29 p.m.

1 stop5h 59m

Washington, D.C. Dulles Intl

Fri 8/5

3:45 p.m.-8:53 a.m.

2 stops17h 08m

C$ 783

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 6/5

9:30 a.m.-6:58 p.m.

2 stops9h 28m

Washington, D.C. Dulles Intl

Fri 8/5

3:45 p.m.-8:53 a.m.

2 stops17h 08m

C$ 786

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 6/5

12:20 p.m.-6:58 p.m.

2 stops6h 38m

Washington, D.C. Dulles Intl

Fri 8/5

3:45 p.m.-8:53 a.m.

2 stops17h 08m

C$ 787

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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?

United Airlines is the most popular carrier operating from London to Washington, D.C. Dulles Intl

Which airlines fly to Washington, D.C. Dulles Intl Airport?

Air Canada, United Airlines and Porter Airlines are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from London, Ontario according to our data. Air Canada is the first choice among our users, with 72% of people opting to fly with this airline when travelling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 3 different airlines that fly to Washington, D.C. Dulles Intl Airport 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. 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 59m

Direct flights

None
The fastest flight from London, Ontario to Washington, D.C. Dulles Intl Airport takes 4h 59m
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

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

    The distance between London and Washington, D.C. Dulles Intl is about 549.2 km. 4h 59m is a normal flight duration for this route.

  • 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 refresh daily.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 required travel and health documents for your Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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
Chantilly
Gaithersburg
Fairfax
Linthicum Heights
Bethesda
National Harbor
Reston
Laurel
Herndon
Winchester
Arlington
Leesburg
Fredericksburg
Ashburn
Manassas
Woodbridge
Silver Spring
Rockville

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?

momondo does allow users to show only those flights to Washington, D.C. from London which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for London to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from London to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 16/4
Thu 23/4
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington, D.C.