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Cheap flights from the United States to London from $208

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 5/12. 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
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.
Air Canada Logo
11:00 am - 8:44 am
SAN
-
YXU
18h 44m
2 stops
Air Canada Logo
5:10 am - 11:53 am
YXU
-
SAN
9h 43m
1 stop
$400Air Canada
Tue, Apr 21 - Tue, Apr 28
Air Canada Logo
11:00 am - 8:44 am
SAN
-
YXU
18h 44m
2 stops
Air Canada Logo
5:10 am - 5:25 pm
YXU
-
SAN
15h 15m
2 stops
$425Air Canada
Tue, Apr 21 - Tue, Apr 28
Air Canada Logo
10:55 pm - 8:44 am
LAX
-
YXU
6h 49m
1 stop
Air Canada Logo
5:10 am - 10:55 am
YXU
-
LAX
8h 45m
1 stop
$457Air Canada
Mon, Apr 27 - Sun, May 3
United Airlines Logo
6:20 pm - 8:44 am
SAN
-
YXU
11h 24m
2 stops
United Airlines Logo
5:10 am - 12:18 pm
YXU
-
SAN
10h 08m
1 stop
$462United Airlines
Tue, Apr 28 - Sat, May 2
United Airlines Logo
11:01 am - 8:44 am
SAN
-
YXU
18h 43m
2 stops
United Airlines Logo
5:10 am - 1:50 pm
YXU
-
SAN
11h 40m
2 stops
$478United Airlines
Tue, Apr 28 - Sat, May 2
Multiple Airlines Logo
11:30 am - 5:20 am
LAX
-
YXU
14h 50m
2 stops
Multiple Airlines Logo
5:10 am - 10:55 am
YXU
-
LAX
8h 45m
1 stop
$481Multiple Airlines
Mon, Apr 27 - Sun, May 3
United Airlines Logo
6:20 pm - 8:44 am
SAN
-
YXU
11h 24m
2 stops
United Airlines Logo
9:30 am - 8:38 pm
YXU
-
SAN
14h 08m
3 stops
$483United Airlines
Tue, Apr 28 - Sat, May 2
Multiple Airlines Logo
6:30 am - 5:20 am
LAX
-
YXU
19h 50m
2 stops
Multiple Airlines Logo
5:10 am - 9:29 pm
YXU
-
LAX
19h 19m
2 stops
$507Multiple Airlines
Mon, Apr 27 - Sun, May 3
WestJet Logo
11:50 am - 6:35 am
LAX
-
YXU
15h 45m
2 stops
WestJet Logo
6:10 am - 12:25 pm
YXU
-
LAX
9h 15m
1 stop
$516WestJet
Wed, Apr 22 - Tue, Apr 28
WestJet Logo
4:55 pm - 5:20 am
LAX
-
YXU
33h 25m
2 stops
WestJet Logo
6:10 am - 11:20 am
YXU
-
LAX
32h 10m
2 stops
$518WestJet
Wed, Jul 8 - Mon, Jul 13

WestJet flights from United States to London, Ontario

Our best WestJet deals on United States to London, Ontario flight tickets
WestJet
Apr 22
LAX11:50 amLos Angeles Los Angeles
15h 45m
2 stops
YXU6:35 amLondon
Apr 28
YXU6:10 amLondon
9h 15m
1 stop
LAX12:25 pmLos Angeles Los Angeles
$516
WestJet
Jul 8
LAX4:55 pmLos Angeles Los Angeles
33h 25m
2 stops
YXU5:20 amLondon
Jul 13
YXU6:10 amLondon
32h 10m
2 stops
LAX11:20 amLos Angeles Los Angeles
$518
WestJet
May 10
DEN12:15 pmDenver Intl
15h 05m
1 stop
YXU5:20 amLondon
May 17
YXU5:55 pmLondon
19h 25m
1 stop
DEN11:20 amDenver Intl
$539

United Airlines flights from United States to London, Ontario

Our best United Airlines deals on United States to London, Ontario flight tickets
United Airlines
Apr 28
SAN6:20 pmSan Diego
11h 24m
2 stops
YXU8:44 amLondon
May 2
YXU5:10 amLondon
10h 08m
1 stop
SAN12:18 pmSan Diego
$462
United Airlines
Apr 28
SAN11:01 amSan Diego
18h 43m
2 stops
YXU8:44 amLondon
May 2
YXU5:10 amLondon
11h 40m
2 stops
SAN1:50 pmSan Diego
$478
United Airlines
Apr 28
SAN6:20 pmSan Diego
11h 24m
2 stops
YXU8:44 amLondon
May 2
YXU9:30 amLondon
14h 08m
3 stops
SAN8:38 pmSan Diego
$483

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 March 28, 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

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Tue 4/21

11:00 am-8:44 am

2 stops18h 44m

London

Tue 4/28

5:10 am-11:53 am

1 stop9h 43m

$400

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Tue 4/21

11:00 am-8:44 am

2 stops18h 44m

London

Tue 4/28

5:10 am-5:25 pm

2 stops15h 15m

$425
Quickest round-trip

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles Los Angeles

Mon 4/27

10:55 pm-8:44 am

1 stop6h 49m

London

Sun 5/3

5:10 am-10:55 am

1 stop8h 45m

$457

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Tue 4/28

6:20 pm-8:44 am

2 stops11h 24m

London

Sat 5/2

5:10 am-12:18 pm

1 stop10h 08m

$462

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Tue 4/28

11:01 am-8:44 am

2 stops18h 43m

London

Sat 5/2

5:10 am-1:50 pm

2 stops11h 40m

$478

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles Los Angeles

Mon 4/27

11:30 am-5:20 am

2 stops14h 50m

London

Sun 5/3

5:10 am-10:55 am

1 stop8h 45m

$481

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Tue 4/28

6:20 pm-8:44 am

2 stops11h 24m

London

Sat 5/2

9:30 am-8:38 pm

3 stops14h 08m

$483

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles Los Angeles

Mon 4/27

6:30 am-5:20 am

2 stops19h 50m

London

Sun 5/3

5:10 am-9:29 pm

2 stops19h 19m

$507

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles Los Angeles

Wed 4/22

11:50 am-6:35 am

2 stops15h 45m

London

Tue 4/28

6:10 am-12:25 pm

1 stop9h 15m

$516

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles Los Angeles

Wed 7/8

4:55 pm-5:20 am

2 stops33h 25m

London

Mon 7/13

6:10 am-11:20 am

2 stops32h 10m

$518

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 57m

Direct flights

None
The fastest flight from United States to London, Ontario takes 3h 57m
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

  • 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
Air CanadaPriceFrom $254Free CancellationRating
7.1
10,853 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.

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