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Cheap flights from the United States to London from $214

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to London departing on 5/21. 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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Find the cheapest flights from the United States to London

Recent round-trip flight deals from the United States to London

Enter your travel dates to find the best prices.
WestJet Logo
7:35 pm - 5:20 am
SEA
-
YXU
6h 45m
1 stop
WestJet Logo
6:10 am - 6:45 pm
YXU
-
SEA
15h 35m
1 stop
$270WestJet
Tue, Sep 22 - Wed, Oct 7
WestJet Logo
6:05 pm - 5:20 am
LAX
-
YXU
8h 15m
1 stop
WestJet Logo
2:40 pm - 10:05 pm
YXU
-
LAX
10h 25m
2 stops
$270WestJet
Tue, Jun 9 - Tue, Jun 16
WestJet Logo
6:05 pm - 5:20 am
LAX
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 12:25 pm
YXU
-
LAX
9h 15m
1 stop
$273WestJet
Wed, Jun 10 - Wed, Jun 17
WestJet Logo
7:35 pm - 5:20 am
SEA
-
YXU
6h 45m
1 stop
WestJet Logo
5:55 pm - 6:45 pm
YXU
-
SEA
27h 50m
1 stop
$292WestJet
Fri, Jun 12 - Mon, Jun 15
Air Canada Logo
7:00 am - 9:40 pm
SAN
-
YXU
11h 40m
2 stops
Air Canada Logo
5:40 am - 12:16 pm
YXU
-
SAN
9h 36m
1 stop
$351Air Canada
Sat, Sep 19 - Wed, Sep 23
Air Canada Logo
7:00 am - 9:40 pm
SAN
-
YXU
11h 40m
2 stops
Air Canada Logo
5:40 am - 12:16 pm
YXU
-
SAN
9h 36m
1 stop
$352Air Canada
Sat, Sep 19 - Wed, Sep 23
Multiple Airlines Logo
10:01 pm - 5:20 am
SFO
-
YXU
28h 19m
2 stops
Multiple Airlines Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$393Multiple Airlines
Thu, May 21 - Tue, May 26
Multiple Airlines Logo
7:35 pm - 5:20 am
SEA
-
YXU
6h 45m
1 stop
Multiple Airlines Logo
6:10 am - 6:26 pm
YXU
-
SEA
15h 16m
2 stops
$437Multiple Airlines
Wed, Jun 10 - Wed, Jun 17
United Airlines Logo
10:47 pm - 9:20 am
SFO
-
YXU
7h 33m
1 stop
United Airlines Logo
6:20 pm - 1:57 am
YXU
-
SFO
10h 37m
2 stops
$507United Airlines
Tue, Jul 21 - Thu, Jul 23
United Airlines Logo
10:04 am - 5:43 pm
IAH
-
YXU
6h 39m
1 stop
United Airlines Logo
3:30 pm - 9:52 pm
YXU
-
IAH
7h 22m
1 stop
$792United Airlines
Thu, Sep 17 - Sun, Sep 20

WestJet flights from United States to London, Ontario

Our best WestJet deals on United States to London, Ontario flight tickets
WestJet
Sep 22
SEA7:35 pmSeattle/Tacoma Intl
6h 45m
1 stop
YXU5:20 amLondon
Oct 7
YXU6:10 amLondon
15h 35m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
$270
WestJet
Jun 10
LAX6:05 pmLos Angeles
8h 15m
1 stop
YXU5:20 amLondon
Jun 17
YXU6:10 amLondon
9h 15m
1 stop
LAX12:25 pmLos Angeles
$273
WestJet
Jun 12
SEA7:35 pmSeattle/Tacoma Intl
6h 45m
1 stop
YXU5:20 amLondon
Jun 15
YXU5:55 pmLondon
27h 50m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
$292

Air Canada flights from United States to London, Ontario

Our best Air Canada deals on United States to London, Ontario flight tickets
Air Canada
Sep 19
SAN7:00 amSan Diego
11h 40m
2 stops
YXU9:40 pmLondon
Sep 23
YXU5:40 amLondon
9h 36m
1 stop
SAN12:16 pmSan Diego
$351
Air Canada
Sep 19
SAN7:00 amSan Diego
11h 40m
2 stops
YXU9:40 pmLondon
Sep 23
YXU5:40 amLondon
9h 36m
1 stop
SAN12:16 pmSan Diego
$352
Air Canada
Sep 19
SAN7:00 amSan Diego
11h 40m
2 stops
YXU9:40 pmLondon
Sep 23
YXU6:20 pmLondon
20h 27m
2 stops
SAN11:47 amSan Diego
$376

momondo Fare Finder

 
Customize your flight search to find flights from United States 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 April 29, 2026.
Use the filters below to find and compare flights from the United States to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 9/22

7:35 pm-5:20 am

1 stop6h 45m

London

Wed 10/7

6:10 am-6:45 pm

1 stop15h 35m

$270

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles

Tue 6/9

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 6/16

2:40 pm-10:05 pm

2 stops10h 25m

$270

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles

Wed 6/10

6:05 pm-5:20 am

1 stop8h 15m

London

Wed 6/17

6:10 am-12:25 pm

1 stop9h 15m

$273

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 6/12

7:35 pm-5:20 am

1 stop6h 45m

London

Mon 6/15

5:55 pm-6:45 pm

1 stop27h 50m

$292

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Sat 9/19

7:00 am-9:40 pm

2 stops11h 40m

London

Wed 9/23

5:40 am-12:16 pm

1 stop9h 36m

$351

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Sat 9/19

7:00 am-9:40 pm

2 stops11h 40m

London

Wed 9/23

5:40 am-12:16 pm

1 stop9h 36m

$352

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 5/21

10:01 pm-5:20 am

2 stops28h 19m

London

Tue 5/26

6:10 am-12:00 pm

1 stop8h 50m

$393

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 6/10

7:35 pm-5:20 am

1 stop6h 45m

London

Wed 6/17

6:10 am-6:26 pm

2 stops15h 16m

$437

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 7/21

10:47 pm-9:20 am

1 stop7h 33m

London

Thu 7/23

6:20 pm-1:57 am

2 stops10h 37m

$507
Quickest round-trip

HoustonLondon

IAH - YXU

IAHYXU

Houston George Bush Intcntl

Thu 9/17

10:04 am-5:43 pm

1 stop6h 39m

London

Sun 9/20

3:30 pm-9:52 pm

1 stop7h 22m

$792

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 London from

How to get the cheapest flight ticket from United States 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

Can stopping save me money on United States to London, Ontario flights?

No. A direct flight is the cheapest option for a flight between United States to London, Ontario.

Cheap United States to London, Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to London, Ontario

Fastest flight time

3h 55m

Direct flights

None
The fastest flight from United States to London, Ontario takes 3h 55m
There are no direct flights from United States to London, Ontario. There are no popular flight routes from United States to London, Ontario.
Search flight deals

Frequently asked questions about flying from the United States to London, Ontario

  • When did momondo last update prices for flights from United States to London Airport?

    Prices for flights from United States to London Airport were last updated today.

  • How many operators does momondo search for flights from United States to London Airport?

  • How old do you have to be to fly from United States 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 United States to London Airport.

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

    The travel and health documents you'll need for your trip to London Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from United States to London, Ontario?

Best airlines flying from United States to London, Ontario

Compare and see reviews for airlines that fly from United States to London, Ontario with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $162Free CancellationRating
7.2
3,328 reviews
Search WestJet flights
Air CanadaPriceFrom $210Free CancellationRating
7.1
10,982 reviews
Search Air Canada flights

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 United States to London?

It is quick and easy to find United States to London 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 London that suits you.

Can I find flights from United States to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from United States with this policy.

How can momondo help me find flights from United States to London?

momondo helps you find the best flight between United States and London 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 United States to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from United States and alert you when they change.

An easier way to manage your London, Ontario trip

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