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Cheap flights from Washington, D.C. Dulles Intl Airport to London from $616

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to London departing on 7/13. 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 Washington, D.C. Dulles Intl Airport to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:45 pm - 5:20 am
IAD
-
YXU
13h 35m
2 stops
Multiple Airlines Logo
10:05 am - 3:24 pm
YXU
-
IAD
5h 19m
1 stop
$616Multiple Airlines
Mon, Jul 13 - Sun, Jul 19
Air Canada Logo
4:20 pm - 8:32 pm
IAD
-
YXU
4h 12m
1 stop
Air Canada Logo
10:05 am - 3:24 pm
YXU
-
IAD
5h 19m
1 stop
$620Air Canada
Mon, Jul 13 - Sun, Jul 19
Air Canada Logo
4:00 pm - 9:40 pm
IAD
-
YXU
5h 40m
1 stop
Air Canada Logo
3:30 pm - 8:25 pm
YXU
-
IAD
4h 55m
1 stop
$705Air Canada
Wed, Sep 9 - Fri, Sep 11
Air Canada Logo
9:45 am - 5:42 pm
IAD
-
YXU
7h 57m
2 stops
Air Canada Logo
10:05 am - 7:01 pm
YXU
-
IAD
8h 56m
2 stops
$710Air Canada
Mon, Jul 13 - Sun, Jul 19
Air Canada Logo
9:55 am - 2:55 pm
IAD
-
YXU
5h 00m
1 stop
Air Canada Logo
5:40 am - 3:00 pm
YXU
-
IAD
9h 20m
2 stops
$714Air Canada
Wed, Sep 9 - Fri, Sep 11
Multiple Airlines Logo
7:00 pm - 5:20 am
IAD
-
YXU
10h 20m
1 stop
Multiple Airlines Logo
8:40 pm - 10:55 pm
YXU
-
IAD
26h 15m
2 stops
$721Multiple Airlines
Fri, Jul 17 - Thu, Jul 23
Air Canada Logo
9:45 am - 5:43 pm
IAD
-
YXU
7h 58m
2 stops
Air Canada Logo
10:05 am - 7:00 pm
YXU
-
IAD
8h 55m
2 stops
$722Air Canada
Wed, Sep 9 - Fri, Sep 11
Air Canada Logo
4:20 pm - 8:32 pm
IAD
-
YXU
4h 12m
1 stop
Air Canada Logo
3:30 pm - 8:24 pm
YXU
-
IAD
4h 54m
1 stop
$739Air Canada
Fri, Jul 17 - Thu, Jul 23
Air Canada Logo
9:55 am - 2:52 pm
IAD
-
YXU
4h 57m
1 stop
Air Canada Logo
3:30 pm - 8:24 pm
YXU
-
IAD
4h 54m
1 stop
$740Air Canada
Sat, Jul 4 - Fri, Jul 10
Air Canada Logo
9:45 am - 5:42 pm
IAD
-
YXU
7h 57m
2 stops
Air Canada Logo
10:05 am - 3:24 pm
YXU
-
IAD
5h 19m
1 stop
$748Air Canada
Sat, Jul 4 - Fri, Jul 10

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

Our best Air Canada deals on Washington, D.C. Dulles Intl Airport to London, Ontario flight tickets
Air Canada
Jul 13
IAD4:20 pmWashington, D.C. Dulles Intl
4h 12m
1 stop
YXU8:32 pmLondon
Jul 19
YXU10:05 amLondon
5h 19m
1 stop
IAD3:24 pmWashington, D.C. Dulles Intl
$620
Air Canada
Sep 9
IAD4:00 pmWashington, D.C. Dulles Intl
5h 40m
1 stop
YXU9:40 pmLondon
Sep 11
YXU3:30 pmLondon
4h 55m
1 stop
IAD8:25 pmWashington, D.C. Dulles Intl
$705
Air Canada
Jul 13
IAD9:45 amWashington, D.C. Dulles Intl
7h 57m
2 stops
YXU5:42 pmLondon
Jul 19
YXU10:05 amLondon
8h 56m
2 stops
IAD7:01 pmWashington, D.C. Dulles Intl
$710

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

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to London, Ontario flight tickets
United Airlines
Jul 29
IAD9:55 amWashington, D.C. Dulles Intl
4h 57m
1 stop
YXU2:52 pmLondon
Aug 5
YXU3:30 pmLondon
4h 54m
1 stop
IAD8:24 pmWashington, D.C. Dulles Intl
$847
United Airlines
Jul 14
IAD8:15 amWashington, D.C. Dulles Intl
12h 17m
2 stops
YXU8:32 pmLondon
Jul 18
YXU3:30 pmLondon
5h 56m
1 stop
IAD9:26 pmWashington, D.C. Dulles Intl
$857
United Airlines
Jul 30
IAD4:20 pmWashington, D.C. Dulles Intl
4h 12m
1 stop
YXU8:32 pmLondon
Aug 6
YXU6:20 pmLondon
13h 02m
2 stops
IAD7:22 amWashington, D.C. Dulles Intl
$862

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to London, Ontario 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 June 18, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 7/13

3:45 pm-5:20 am

2 stops13h 35m

London

Sun 7/19

10:05 am-3:24 pm

1 stop5h 19m

$616

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 7/13

4:20 pm-8:32 pm

1 stop4h 12m

London

Sun 7/19

10:05 am-3:24 pm

1 stop5h 19m

$620

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 9/9

4:00 pm-9:40 pm

1 stop5h 40m

London

Fri 9/11

3:30 pm-8:25 pm

1 stop4h 55m

$705

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 7/13

9:45 am-5:42 pm

2 stops7h 57m

London

Sun 7/19

10:05 am-7:01 pm

2 stops8h 56m

$710

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 9/9

9:55 am-2:55 pm

1 stop5h 00m

London

Fri 9/11

5:40 am-3:00 pm

2 stops9h 20m

$714

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 7/17

7:00 pm-5:20 am

1 stop10h 20m

London

Thu 7/23

8:40 pm-10:55 pm

2 stops26h 15m

$721

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 9/9

9:45 am-5:43 pm

2 stops7h 58m

London

Fri 9/11

10:05 am-7:00 pm

2 stops8h 55m

$722
Quickest round-trip

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 7/17

4:20 pm-8:32 pm

1 stop4h 12m

London

Thu 7/23

3:30 pm-8:24 pm

1 stop4h 54m

$739

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 7/4

9:55 am-2:52 pm

1 stop4h 57m

London

Fri 7/10

3:30 pm-8:24 pm

1 stop4h 54m

$740

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 7/4

9:45 am-5:42 pm

2 stops7h 57m

London

Fri 7/10

10:05 am-3:24 pm

1 stop5h 19m

$748

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to London, Ontario

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 London, Ontario?

Air Canada, United Airlines and Delta are the top three most popular airlines that fly to London, Ontario from Washington, D.C. Dulles Intl Airport according to our data. Air Canada is the first choice among our users, with 57% of people opting to fly with this airline when traveling to London, Ontario. Keep in mind that there are 4 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

When to book flights from Washington, D.C. Dulles Intl Airport to London, Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to London, Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to London, Ontario (IAD to YXU) flight deals and tips

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

Fastest flight time

4h 12m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to London, Ontario takes 4h 12m
There are no direct flights from Washington, D.C. Dulles Intl Airport to London, Ontario. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to London, Ontario.
Search flight deals

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

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

    There are 341.3 mi between Washington, D.C. Dulles Intl and London. In terms of flight time, this usually takes a little over 4h 12m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to London Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to London Airport were last updated today.

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

    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 Washington, D.C. Dulles Intl Airport to London Airport.

  • What documentation or ID do you need to fly to London Airport?

    The travel and health documents required for your trip to London Airport 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 London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend
Port Stanley

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to London. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to London from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to London from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to London from Washington, D.C.. 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.

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