HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
London

$172+ Cheap flights from California to London, ON (YXU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from California to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from California to London

Keep the following information in mind while searching for California to London flight deals. Data was last updated julio 31, 2025.

Round-trip from

$350
(Trip.com)

One-way from

$172
(Trip.com)

Popular in

July

Cheapest in

May

Average price

$558
From California to London
Search Deals
One-way flight from California to London
Search Deals
Highest demand for flights based on searches. 28% potential increase in price ($155 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from California to London

Cheapest flights from California to London
Explore the most affordable flight options available from California to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 31, 2025.

This Trip.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/810:15 amSFO - YXU
2 stops15h 57mMultiple Airlines
mar. 9/166:00 amYXU - SFO
1 stop8h 54mMultiple Airlines
Deal found 7/29$350
This oojo deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/122:45 pmSFO - YXU
2 stops11h 27mWestJet
vie. 9/196:00 amYXU - SFO
1 stop8h 54mWestJet
Deal found 7/29$371
This FlightHub deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/211:00 pmSAN - YXU
2 stops13h 14mWestJet
vie. 10/246:00 amYXU - SAN
1 stop10h 20mWestJet
Deal found 7/30$382
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/136:15 amSAN - YXU
2 stops19h 57mMultiple Airlines
sáb. 9/208:00 pmYXU - SAN
1 stop20h 20mMultiple Airlines
Deal found 7/30$427
This oojo deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/126:05 pmLAX - YXU
1 stop8h 07mWestJet
dom. 9/148:00 pmYXU - LAX
1 stop28h 46mWestJet
Deal found 7/29$431
This United deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/287:24 pmLAX - YXU
2 stops16h 38mMultiple Airlines
dom. 8/313:40 pmYXU - LAX
1 stop8h 20mMultiple Airlines
Deal found 7/30$503
This Mytrip deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/276:30 amSMF - YXU
3 stops19h 44mMultiple Airlines
mié. 9/39:45 pmYXU - SMF
3 stops37h 53mMultiple Airlines
Deal found 7/30$541
This Air Canada deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/206:15 amSAN - YXU
2 stops24h 02mAir Canada
vie. 10/246:15 amYXU - SAN
2 stops12h 35mAir Canada
Deal found 7/30$553
This Air Canada deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/281:30 pmLAX - YXU
1 stop16h 47mAir Canada
dom. 8/313:40 pmYXU - LAX
1 stop8h 20mAir Canada
Deal found 7/30$579
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/2110:30 pmSAN - YXU
2 stops13h 32mUnited Airlines
vie. 10/243:40 pmYXU - SAN
2 stops11h 35mUnited Airlines
Deal found 7/30$583
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/132:05 pmSAN - YXU
1 stop12h 07mDelta
sáb. 9/206:00 amYXU - SAN
1 stop10h 20mDelta
Deal found 7/30$586
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1112:56 amLAX - YXU
2 stops11h 21mUnited Airlines
dom. 9/146:10 amYXU - LAX
1 stop9h 18mUnited Airlines
Deal found 7/29$654

Cheapflights Fare Finder

 
Customize your flight search to find flights from California to London 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, Cheapflights users made 2,558,603 searches. Data last updated julio 31, 2025.
Use the filters below to find and compare flights from California to London that are best for you.

Fly from

California

Fly to

London

Route

Depart

Return

Price

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

lun. 9/8

10:15 am-5:12 am

2 stops15h 57m

London

mar. 9/16

6:00 am-11:54 am

1 stop8h 54m

$350

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

vie. 9/12

2:45 pm-5:12 am

2 stops11h 27m

London

vie. 9/19

6:00 am-11:54 am

1 stop8h 54m

$371

San DiegoLondon

SAN - YXU

SANYXU

San Diego

jue. 8/21

1:00 pm-5:14 am

2 stops13h 14m

London

vie. 10/24

6:00 am-1:20 pm

1 stop10h 20m

$382

San DiegoLondon

SAN - YXU

SANYXU

San Diego

sáb. 9/13

6:15 am-5:12 am

2 stops19h 57m

London

sáb. 9/20

8:00 pm-1:20 pm

1 stop20h 20m

$427

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles

vie. 9/12

6:05 pm-5:12 am

1 stop8h 07m

London

dom. 9/14

8:00 pm-9:46 pm

1 stop28h 46m

$431

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles

jue. 8/28

7:24 pm-3:02 pm

2 stops16h 38m

London

dom. 8/31

3:40 pm-9:00 pm

1 stop8h 20m

$503

SacramentoLondon

SMF - YXU

SMFYXU

Sacramento Intl

mié. 8/27

6:30 am-5:14 am

2 stops19h 44m

London

mié. 9/3

9:45 pm-8:38 am

3 stops37h 53m

$541

San DiegoLondon

SAN - YXU

SANYXU

San Diego

mié. 8/20

6:15 am-9:17 am

2 stops24h 02m

London

vie. 10/24

6:15 am-3:50 pm

2 stops12h 35m

$553

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles

jue. 8/28

1:30 pm-9:17 am

1 stop16h 47m

London

dom. 8/31

3:40 pm-9:00 pm

1 stop8h 20m

$579

San DiegoLondon

SAN - YXU

SANYXU

San Diego

jue. 8/21

10:30 pm-3:02 pm

2 stops13h 32m

London

vie. 10/24

3:40 pm-12:15 am

2 stops11h 35m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 25 results
1
2
3

Best time to book a flight from California to London

Have a flexible travel schedule? Discover the best time to fly to London from California with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from California to London

What is the cheapest time of day to fly from CA to YXU?

Find hourly flight availability from California to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 31, 2025.

When flying from California to London, Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from California to London, Ontario?

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated julio 31, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and WestJet from California to London by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,978 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.1
Good
9,851 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Flair Airlines
6.0
Okay
247 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from California to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to London from California?

    London (YXU) is the airport you will fly into if you book a flight from California to London. It is only a 5.3 mi journey from London (YXU) to London’s city center.

  • What are the cheapest airlines to fly from California to London, Ontario one-way?

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $183. However, be on the lookout for offers from United Airlines and Flair Airlines, as they are both options that can get you from California to London, Ontario for a low price.

  • What are the most popular routes from California to London, Ontario?

    When deciding which route to take from California to London, Ontario consider San Jose - London, Los Angeles - London or San Francisco - London as they are the most popular.

  • Can I find deals for flights from California to London that include hotel bookings?

    Yes. In addition to deals on California to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from California to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to London.

  • Can I find deals for business class flights from California to London?

    Yes. Cheapflights offers flight deals from California to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near London?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for California to London

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Pearson Intl flights
Newark to Toronto Island flights
John F Kennedy Intl to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Boston to Pearson Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
LaGuardia to Pearson Intl flights
Newark to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Reagan-National to Pearson Intl flights
Los Angeles to Pearson Intl flights
Boston to Toronto Island flights
Dallas/Fort Worth to Pearson Intl flights
San Francisco to Pearson Intl flights
Hobby to Pearson Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
Dulles Intl to Toronto Island flights
Fort Lauderdale to Pearson Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Seattle to Pearson Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Atlanta to Pearson Intl flights
John F Kennedy Intl to Toronto Island flights
San Francisco to Pierre Elliott Trudeau Intl flights
Baltimore to Pearson Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
George Bush Intcntl to Pearson Intl flights
Minneapolis to Pearson Intl flights
Midway to Toronto Island flights
Boston to Pierre Elliott Trudeau Intl flights
Midway to Pearson Intl flights
Philadelphia to Pearson Intl flights
Orlando to Pearson Intl flights
Philadelphia to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Toronto Island flights
Fort Lauderdale to Pierre Elliott Trudeau Intl flights
Raleigh to Pearson Intl flights
Atlanta to Pierre Elliott Trudeau Intl flights
Denver to Pierre Elliott Trudeau Intl flights
Baltimore to Pierre Elliott Trudeau Intl flights
Miami to Pearson Intl flights
San Diego to Pearson Intl flights
Seattle to Pierre Elliott Trudeau Intl flights
Denver to Pearson Intl flights
LaGuardia to Toronto Island flights
Charlotte to Pearson Intl flights
Dallas/Fort Worth to Pierre Elliott Trudeau Intl flights
Tampa to Pearson Intl flights
Nashville to Pearson Intl flights

Top 3 airlines flying from California to London

Discover the top 3 airlines that operate flights from California to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$138Average$425FlexibilityNo cancel feeOn-time67%
WestJetCheapest$162Average$491FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$183Average$381FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.