Cheap flights from District of Columbia to London from $430

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from District of Columbia to London departing on 10/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

WestJet Logo
6:45 pm - 5:12 amIAD-YXU
10h 27m1 stop
WestJet Logo
6:00 am - 5:50 pmYXU-IAD
11h 50m1 stop
$430WestJet
Find Deal
Fri, Oct 3 - Fri, Oct 10
 Logo
8:59 pm - 5:12 amIAD-YXU
32h 13m2 stops
 Logo
8:00 pm - 5:50 pmYXU-IAD
21h 50m1 stop
Thu, Oct 2 - Thu, Oct 9
 Logo
6:45 pm - 5:12 amIAD-YXU
10h 27m1 stop
 Logo
6:00 am - 12:11 amYXU-IAD
18h 11m2 stops
Fri, Oct 3 - Fri, Oct 10
WestJet Logo
6:45 pm - 5:12 amIAD-YXU
10h 27m1 stop
WestJet Logo
6:00 am - 11:57 amYXU-IAD
29h 57m3 stops
$670WestJet
Find Deal
Fri, Oct 3 - Fri, Oct 10
 Logo
5:22 pm - 9:29 pmIAD-YXU
4h 07m1 stop
 Logo
9:55 am - 2:25 pmYXU-IAD
4h 30m1 stop
Sat, Sep 27 - Thu, Oct 2
 Logo
10:20 am - 3:02 pmIAD-YXU
4h 42m1 stop
 Logo
9:55 am - 2:25 pmYXU-IAD
4h 30m1 stop
Thu, Oct 2 - Thu, Oct 9
Air Canada Logo
11:00 am - 3:17 pmDCA-YXU
4h 17m1 stop
Air Canada Logo
3:50 pm - 7:44 pmYXU-DCA
3h 54m1 stop
$713Air Canada
Find Deal
Wed, Sep 17 - Wed, Sep 24
Air Canada Logo
11:00 am - 3:17 pmDCA-YXU
4h 17m1 stop
Air Canada Logo
6:10 am - 12:08 pmYXU-DCA
5h 58m2 stops
$718Air Canada
Find Deal
Wed, Sep 17 - Wed, Sep 24
United Airlines Logo
7:25 am - 3:02 pmDCA-YXU
7h 37m2 stops
United Airlines Logo
3:40 pm - 7:44 pmYXU-DCA
4h 04m1 stop
$1,031United Airlines
Find Deal
Thu, Oct 2 - Thu, Oct 9
United Airlines Logo
7:00 am - 3:02 pmDCA-YXU
8h 02m2 stops
United Airlines Logo
6:15 am - 3:22 pmYXU-DCA
9h 07m2 stops
$1,047United Airlines
Find Deal
Thu, Oct 2 - Thu, Oct 9

WestJet flights from District of Columbia to London, Ontario

Our best WestJet deals on District of Columbia to London, Ontario flight tickets
WestJet
Oct 3
IAD6:45 pmWashington, D.C. Dulles Intl
10h 27m
1 stop
YXU5:12 amLondon
Oct 10
YXU6:00 amLondon
11h 50m
1 stop
IAD5:50 pmWashington, D.C. Dulles Intl
WestJet
Oct 3
IAD6:45 pmWashington, D.C. Dulles Intl
10h 27m
1 stop
YXU5:12 amLondon
Oct 10
YXU6:00 amLondon
29h 57m
3 stops
IAD11:57 amWashington, D.C. Dulles Intl
WestJet
Sep 8
IAD6:15 pmWashington, D.C. Dulles Intl
34h 57m
3 stops
YXU5:12 amLondon
Sep 12
YXU6:00 amLondon
11h 50m
1 stop
IAD5:50 pmWashington, D.C. Dulles Intl

Air Canada flights from District of Columbia to London, Ontario

Our best Air Canada deals on District of Columbia to London, Ontario flight tickets
Air Canada
Sep 17
DCA11:00 amWashington, D.C. Reagan-National
4h 17m
1 stop
YXU3:17 pmLondon
Sep 24
YXU3:50 pmLondon
3h 54m
1 stop
DCA7:44 pmWashington, D.C. Reagan-National
Air Canada
Sep 17
DCA11:00 amWashington, D.C. Reagan-National
4h 17m
1 stop
YXU3:17 pmLondon
Sep 24
YXU6:10 amLondon
5h 58m
2 stops
DCA12:08 pmWashington, D.C. Reagan-National
Air Canada
Oct 3
DCA11:00 amWashington, D.C. Reagan-National
4h 02m
1 stop
YXU3:02 pmLondon
Oct 10
YXU3:40 pmLondon
4h 04m
1 stop
DCA7:44 pmWashington, D.C. Reagan-National

momondo Fare Finder

 
Customize your flight search to find flights from District of Columbia 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 August 20, 2025.
Use the filters below to find and compare flights from District of Columbia to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 10/3

6:45 pm-5:12 am

1 stop10h 27m

London

Fri 10/10

6:00 am-5:50 pm

1 stop11h 50m

$430

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 10/2

8:59 pm-5:12 am

2 stops32h 13m

London

Thu 10/9

8:00 pm-5:50 pm

1 stop21h 50m

$573

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 10/3

6:45 pm-5:12 am

1 stop10h 27m

London

Fri 10/10

6:00 am-12:11 am

2 stops18h 11m

$590

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 10/3

6:45 pm-5:12 am

1 stop10h 27m

London

Fri 10/10

6:00 am-11:57 am

3 stops29h 57m

$670

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 9/27

5:22 pm-9:29 pm

1 stop4h 07m

London

Thu 10/2

9:55 am-2:25 pm

1 stop4h 30m

$682

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 10/2

10:20 am-3:02 pm

1 stop4h 42m

London

Thu 10/9

9:55 am-2:25 pm

1 stop4h 30m

$691

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Wed 9/17

11:00 am-3:17 pm

1 stop4h 17m

London

Wed 9/24

3:50 pm-7:44 pm

1 stop3h 54m

$713

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Wed 9/17

11:00 am-3:17 pm

1 stop4h 17m

London

Wed 9/24

6:10 am-12:08 pm

2 stops5h 58m

$718

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Thu 10/2

7:25 am-3:02 pm

2 stops7h 37m

London

Thu 10/9

3:40 pm-7:44 pm

1 stop4h 04m

$1,031

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Thu 10/2

7:00 am-3:02 pm

2 stops8h 02m

London

Thu 10/9

6:15 am-3:22 pm

2 stops9h 07m

$1,047

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from District of Columbia 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 is the cheapest day to depart on your flight to London, Ontario?

According to our data, Friday is the cheapest day to fly to London, Ontario from District of Columbia. The lowest ticket price found for a Friday departure recently was $534. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London, Ontario on Saturday is $556.

What is the cheapest time of day to depart on your flight to London, Ontario?

In the afternoon is the cheapest time of day to fly from District of Columbia to London, Ontario when you can find flight prices for as low as $534. Flying to London, Ontario in the afternoon is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to London, Ontario, so prices are often more expensive at around $685 per ticket.

Cheap District of Columbia to London, Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to London, Ontario

Direct flights

None
There are no direct flights from District of Columbia to London, Ontario. There are no popular flight routes from District of Columbia to London, Ontario.
  • When did momondo last update prices for flights from District of Columbia to London Airport?

    Prices for flights from District of Columbia to London Airport are refreshed on a daily basis.

  • How old do you have to be to fly from District of Columbia to London Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from District of Columbia to London Airport.

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

    The required travel and health documents for your London 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 London Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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 District of Columbia to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from District of Columbia to London for you.

Can I find flights from District of Columbia to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for District of Columbia to London flights to just show those with flexible booking policies.

How can momondo help me find flights from District of Columbia to London?

Once all potential District of Columbia to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from District of Columbia to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for District of Columbia to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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1 adult
Mon 8/25
Mon 9/1

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