How long is the flight from London, Ontario to San Francisco?

Airlines like United Airlines fly from London, Ontario to San Francisco in about 8h 44m. The time it takes to get you to your destination can typically vary by up to . The distance from London, Ontario to San Francisco is about 2180 mi.

What is the cheapest airline to fly from London, Ontario to San Francisco round-trip?

Air Canada, at $222, was found to be the cheapest airline from London, Ontario to San Francisco.. Air Canada is currently priced 43% below the average price you’ll pay for this route.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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

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

Most accurate provider : When it comes to deals on London, Ontario-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London, Ontario-San Francisco flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London, Ontario-San Francisco flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London, Ontario-San Francisco flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London, Ontario-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from London to San Francisco that include hotel bookings?

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

How can I find direct flights from London to San Francisco?

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

Can I find deals for business class flights from London to San Francisco?

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

$183+ Flights from London, ON to San Francisco

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1. Tell us where you want to go

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Find flight deals from London to San Francisco

Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 29, 2025.

jue. 12/115:10 amYXU - SFO

1 stop8h 44mUnited Airlines

jue. 12/185:00 amSFO - YXU

2 stops13h 21mUnited Airlines

Deal found 10/27

$584

vie. 12/129:25 amYXU - SFO

1 stop9h 00mUnited Airlines

vie. 12/195:00 amSFO - YXU

2 stops13h 21mUnited Airlines

Deal found 10/28

$614

Best flights from London to San Francisco
Discover carefully curated flight deals from London to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated octubre 29, 2025.

jue. 12/115:10 amYXU - SFO

1 stop8h 44mUnited Airlines

jue. 12/185:00 amSFO - YXU

2 stops13h 21mUnited Airlines

Deal found 10/27

$584

vie. 12/129:25 amYXU - SFO

1 stop9h 00mUnited Airlines

vie. 12/195:00 amSFO - YXU

2 stops13h 21mUnited Airlines

Deal found 10/28

$614

One-way flights from London to San Francisco
Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated octubre 29, 2025.

mié. 1/78:10 pmYXU - SFO

1 stop19h 02mWestJet

Deal found 10/28

$183

vie. 1/95:15 amYXU - SFO

1 stop8h 39mAir Canada

Deal found 10/29

$193

dom. 1/118:10 pmYXU - SFO

2 stops21h 11mMultiple Airlines

Deal found 10/29

$205

sáb. 1/109:25 amYXU - SFO

1 stop15h 14mAir Canada

Deal found 10/29

$216

vie. 1/97:30 amYXU - SFO

2 stops37h 05mMultiple Airlines

Deal found 10/29

$218

mié. 1/78:10 pmYXU - SFO

2 stops16h 20mMultiple Airlines

Deal found 10/28

$227

vie. 12/129:25 amYXU - SFO

1 stop9h 00mAir Canada

Deal found 10/28

$231

mar. 1/65:10 amYXU - SFO

2 stops18h 24mAir Canada

Deal found 10/28

$299

jue. 1/19:25 amYXU - SFO

2 stops15h 04mUnited Airlines

Deal found 10/28

$300

Cheap flight deals from London to San Francisco

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$584 (United Airlines)
One-way from	$183 (Kiwi.com)
Popular in	December
Cheapest in	August
Average price	$318

Provider with most accurate pricing for London-San Francisco flight deals.

Search Deals

Provider most trusted by Cheapflights users for London-San Francisco flights.

Search Deals

From London to San Francisco

Search Deals

One-way flight from London to San Francisco

Search Deals

Highest demand for flights based on searches. 29% potential increase in price ($165 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($24 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

YXU - SFO

YXUSFO

London

jue. 12/11

5:10 am-10:54 am

1 stop8h 44m

San Francisco

jue. 12/18

5:00 am-9:21 pm

2 stops13h 21m

$584

LondonSan Francisco

YXU - SFO

YXUSFO

London

vie. 12/12

9:25 am-3:25 pm

1 stop9h 00m

San Francisco

vie. 12/19

5:00 am-9:21 pm

2 stops13h 21m

$614

LondonSan Francisco

YXU - SFO

YXUSFO

London

vie. 1/9

5:15 am-10:54 am

1 stop8h 39m

$193

LondonSan Francisco

YXU - SFO

YXUSFO

London

dom. 1/11

8:10 pm-2:21 pm

2 stops21h 11m

$205

LondonSan Francisco

YXU - SFO

YXUSFO

London

vie. 1/9

7:30 am-5:35 pm

2 stops37h 05m

$218

LondonSan Francisco

YXU - SFO

YXUSFO

London

mié. 1/7

8:10 pm-9:30 am

2 stops16h 20m

$227

LondonSan Francisco

YXU - SFO

YXUSFO

London

vie. 12/12

9:25 am-3:25 pm

1 stop9h 00m

$231

LondonSan Francisco

YXU - SFO

YXUSFO

London

mar. 1/6

5:10 am-8:34 pm

2 stops18h 24m

$299

LondonSan Francisco

YXU - SFO

YXUSFO

London

jue. 1/1

9:25 am-9:29 pm

2 stops15h 04m

$300

LondonSan Francisco

YXU - SFO

YXUSFO

London

lun. 1/5

9:25 am-12:03 am

2 stops17h 38m

$300

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Compare providers for flights from London to San Francisco

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to San Francisco in October.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on London, Ontario-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London, Ontario-San Francisco flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London, Ontario-San Francisco flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London, Ontario-San Francisco flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London, Ontario-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London 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 London to San Francisco

What is the cheapest month to book a flight from London, Ontario to San Francisco?

Currently, April is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of $144). Flying from London, Ontario to San Francisco in January is currently the most expensive (average of $263). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Francisco

Read reviews from past customers who have flown Air Canada from London to San Francisco. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Air Canada

7.1

Good

10,372 reviews

Reviews

1 / 20

10.0

Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.

Air Canada

7.1

Good

10,372 reviews

Air Canada

7.1

Good

10,372 reviews

Reviews

1 / 20

10.0

Excellent

janet,Sep 2025

YOW - YYZ

Related info for your journey

How long is the flight from London, Ontario to San Francisco?
Airlines like United Airlines fly from London, Ontario to San Francisco in about 8h 44m. The time it takes to get you to your destination can typically vary by up to . The distance from London, Ontario to San Francisco is about 2180 mi.
What is the cheapest airline to fly from London, Ontario to San Francisco round-trip?
Air Canada, at $222, was found to be the cheapest airline from London, Ontario to San Francisco.. Air Canada is currently priced 43% below the average price you’ll pay for this route.
Can I find deals for flights from London to San Francisco that include hotel bookings?
Yes. In addition to deals on London to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Francisco.
Can I find deals for business class flights from London to San Francisco?
Yes. Cheapflights offers flight deals from London to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London, Ontario to San Francisco?
Currently, April is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of $144). Flying from London, Ontario to San Francisco in January is currently the most expensive (average of $263). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Roseville

South San Francisco

Santa Cruz

Livermore

Turlock

Watsonville

Sunnyvale

Santa Clara

Antioch

Manteca

Vallejo

Hollister

Vacaville

San Bruno

Foster City

Redwood City

Union City

Fairfield

Burlingame

Lodi

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from London to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$222	Average$268	FlexibilityNo cancel fee	On-time67%

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$183+ Cheap flights from London, ON (YXU) to San Francisco (SFO)

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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from London to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from London to San Francisco

Cheapest flights from London to San FranciscoExplore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 29, 2025.

Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 29, 2025.

Cheap flight deals from London to San Francisco

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to San Francisco that are best for you.

Compare providers for flights from London to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to San Francisco in October.

Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London to San Francisco

What is the cheapest month to book a flight from London, Ontario to San Francisco?

Reviews of airlines servicing San Francisco

Read reviews from past customers who have flown Air Canada from London to San Francisco. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

How long is the flight from London, Ontario to San Francisco?

What is the cheapest airline to fly from London, Ontario to San Francisco round-trip?

Can I find deals for flights from London to San Francisco that include hotel bookings?

How can I find direct flights from London to San Francisco?

Can I find deals for business class flights from London to San Francisco?

What is the cheapest month to book a flight from London, Ontario to San Francisco?

Traveling to a place near San Francisco?

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 London to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from London to San Francisco

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Book with Flexibility

Travel Smart

Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 29, 2025.