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Cheap flights from the United States to London from $182

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 8/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$346WestJet
Thu, Jul 9 - Tue, Jul 14
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
2:40 pm - 9:55 pm
YXU
-
SFO
10h 15m
2 stops
$352WestJet
Fri, Jul 10 - Tue, Jul 14
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$367WestJet
Fri, Jul 10 - Tue, Jul 14
WestJet Logo
6:05 pm - 5:20 am
LAX
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 4:00 pm
YXU
-
LAX
12h 50m
2 stops
$368WestJet
Wed, Jun 17 - Mon, Jun 29
WestJet Logo
6:05 pm - 5:20 am
LAX
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 2:05 pm
YXU
-
LAX
10h 55m
1 stop
$371WestJet
Wed, Jun 17 - Mon, Jun 29
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
$458Air Canada
Tue, Sep 22 - Sat, Sep 26
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
$459Air Canada
Tue, Sep 22 - Sat, Sep 26
Air Canada Logo
7:00 am - 9:40 pm
SAN
-
YXU
11h 40m
2 stops
Air Canada Logo
5:40 am - 4:12 pm
YXU
-
SAN
13h 32m
2 stops
$464Air Canada
Tue, Sep 22 - Sat, Sep 26
Air Canada Logo
7:00 am - 9:38 pm
SAN
-
YXU
11h 38m
2 stops
Air Canada Logo
5:10 am - 12:18 pm
YXU
-
SAN
10h 08m
1 stop
$467Air Canada
Sun, May 3 - Sun, May 17
Multiple Airlines Logo
6:30 pm - 5:20 am
BOS
-
YXU
10h 50m
1 stop
Multiple Airlines Logo
5:55 pm - 5:35 pm
YXU
-
BOS
23h 40m
2 stops
$598Multiple Airlines
Thu, Jun 18 - Mon, Jun 22

WestJet flights from United States to London, Ontario

Our best WestJet deals on United States to London, Ontario flight tickets
WestJet
Jul 9
SFO6:05 pmSan Francisco
8h 15m
1 stop
YXU5:20 amLondon
Jul 14
YXU6:10 amLondon
8h 50m
1 stop
SFO12:00 pmSan Francisco
$346
WestJet
Jul 10
SFO6:05 pmSan Francisco
8h 15m
1 stop
YXU5:20 amLondon
Jul 14
YXU2:40 pmLondon
10h 15m
2 stops
SFO9:55 pmSan Francisco
$352
WestJet
Jul 10
SFO6:05 pmSan Francisco
8h 15m
1 stop
YXU5:20 amLondon
Jul 14
YXU6:10 amLondon
8h 50m
1 stop
SFO12:00 pmSan Francisco
$367

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 22
SAN7:00 amSan Diego
11h 40m
2 stops
YXU9:40 pmLondon
Sep 26
YXU5:40 amLondon
9h 36m
1 stop
SAN12:16 pmSan Diego
$458
Air Canada
Sep 22
SAN7:00 amSan Diego
11h 40m
2 stops
YXU9:40 pmLondon
Sep 26
YXU5:40 amLondon
9h 36m
1 stop
SAN12:16 pmSan Diego
$459
Air Canada
Sep 22
SAN7:00 amSan Diego
11h 40m
2 stops
YXU9:40 pmLondon
Sep 26
YXU5:40 amLondon
13h 32m
2 stops
SAN4:12 pmSan Diego
$464

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 19, 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
Quickest round-trip

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 7/9

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 7/14

6:10 am-12:00 pm

1 stop8h 50m

$346

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 7/10

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 7/14

2:40 pm-9:55 pm

2 stops10h 15m

$352

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 7/10

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 7/14

6:10 am-12:00 pm

1 stop8h 50m

$367

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles

Wed 6/17

6:05 pm-5:20 am

1 stop8h 15m

London

Mon 6/29

6:10 am-4:00 pm

2 stops12h 50m

$368

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles

Wed 6/17

6:05 pm-5:20 am

1 stop8h 15m

London

Mon 6/29

6:10 am-2:05 pm

1 stop10h 55m

$371

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Tue 9/22

7:00 am-9:40 pm

2 stops11h 40m

London

Sat 9/26

5:40 am-12:16 pm

1 stop9h 36m

$458

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Tue 9/22

7:00 am-9:40 pm

2 stops11h 40m

London

Sat 9/26

5:40 am-12:16 pm

1 stop9h 36m

$459

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Tue 9/22

7:00 am-9:40 pm

2 stops11h 40m

London

Sat 9/26

5:40 am-4:12 pm

2 stops13h 32m

$464

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Sun 5/3

7:00 am-9:38 pm

2 stops11h 38m

London

Sun 5/17

5:10 am-12:18 pm

1 stop10h 08m

$467

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Thu 6/18

6:30 pm-5:20 am

1 stop10h 50m

London

Mon 6/22

5:55 pm-5:35 pm

2 stops23h 40m

$598

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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

What is the cheapest United States to London flight route?

Fly from Orlando to London for the best United States - London flight prices

What cabin class options are available on United States to London flights?

There is only 1 cabin class available to choose from on United States to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

4h 03m

Direct flights

None
The fastest flight from United States to London, Ontario takes 4h 03m
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
3,322 reviews
Search WestJet flights
Air CanadaPriceFrom $210Free CancellationRating
7.1
10,939 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

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.
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