YXU - SFO

C$ 213 Find Cheap Flights from London to San Francisco – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to San Francisco departing on 19/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
C$ 423
Typical prices: C$ 248-C$ 314
WestJet
Thu 13/8Thu 20/8
YXU - SFO • 1 stop
Cheapest one-way flights
C$ 213
WestJet
Wed 19/8
YXU - SFO • 1 stop
Top airlines
Cheapest • from C$ 464 (round-trip)
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between London and San Francisco. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg C$ 534 (round-trip)
Shortest trip • 8h 39m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from London to San Francisco (YXU-SFO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from London to San Francisco

Thu, 13 Aug - Thu, 20 Aug
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 a.m. - 4:45 p.m.
SFO
-
YXU
7h 45m
1 stop
C$ 423WestJet
Mon, 17 Aug - Mon, 24 Aug
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:05 p.m. - 4:45 p.m.
SFO
-
YXU
19h 40m
1 stop
C$ 464WestJet
Thu, 13 Aug - Thu, 20 Aug
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 a.m. - 1:50 p.m.
SFO
-
YXU
28h 50m
2 stops
C$ 470WestJet
Thu, 8 Oct - Tue, 13 Oct
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 a.m. - 5:20 a.m.
SFO
-
YXU
20h 20m
1 stop
C$ 489WestJet
Tue, 22 Sep - Sat, 26 Sep
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
1:00 p.m. - 4:45 p.m.
SFO
-
YXU
24h 45m
1 stop
C$ 512WestJet
Tue, 22 Sep - Sat, 26 Sep
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
1:00 p.m. - 4:45 p.m.
SFO
-
YXU
24h 45m
1 stop
C$ 514WestJet
Tue, 22 Sep - Sat, 26 Sep
Air Canada Logo
5:40 a.m. - 10:44 a.m.
YXU
-
SFO
8h 04m
1 stop
Air Canada Logo
12:50 p.m. - 9:20 a.m.
SFO
-
YXU
17h 30m
2 stops
C$ 526Air Canada
Tue, 22 Sep - Sat, 26 Sep
Air Canada Logo
5:40 a.m. - 10:44 a.m.
YXU
-
SFO
8h 04m
1 stop
Air Canada Logo
12:50 p.m. - 9:20 a.m.
SFO
-
YXU
17h 30m
2 stops
C$ 528Air Canada
Thu, 8 Oct - Tue, 13 Oct
WestJet Logo
5:55 p.m. - 12:00 p.m.
YXU
-
SFO
21h 05m
1 stop
WestJet Logo
6:00 a.m. - 5:20 a.m.
SFO
-
YXU
20h 20m
1 stop
C$ 532WestJet
Thu, 8 Oct - Tue, 13 Oct
WestJet Logo
5:55 p.m. - 12:00 p.m.
YXU
-
SFO
21h 05m
1 stop
WestJet Logo
6:00 a.m. - 5:20 a.m.
SFO
-
YXU
20h 20m
1 stop
C$ 543WestJet
Booking Insights

KAYAK's insights & trends for London to San Francisco flights

Get data-powered insights and trends into flights from London to San Francisco to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from London, Ontario to San Francisco?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from London, Ontario to San Francisco departing in August.

What is the cheapest month to fly from London to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London to San Francisco is February, where tickets cost C$ 0 (return) on average. On the other hand, the most expensive months are September and November, where the average cost of round-trip tickets is C$ 1,680 and C$ 1,175 respectively.

Good to know

Low seasonAugust
Cheapest flightC$ 213
Best time to beat the crowds (67% less expensive on average)
Most popular time to fly and prices are also 67% lower on average.
Flight from London to San Francisco

When to book flights from London to San Francisco

Are your dates flexible? Find out the best times to travel from London to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from London to San Francisco

  • What is the cheapest flight from London to San Francisco?

    In the last 5 days, the lowest price for a flight from London to San Francisco was C$ 213 for a one-way ticket and C$ 464 for a round-trip.

  • Which airports will I be using when flying from London to San Francisco?

    London airport is called London and the only airport in San Francisco is San Francisco.

  • Which aircraft models fly most regularly from London to San Francisco?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London to San Francisco?

    Star Alliance is the only airline alliance operating flights between London and San Francisco.

  • Which is the best airline for flights from London to San Francisco, WestJet or Air Canada?

    The two airlines most popular with KAYAK users for flights from London to San Francisco are WestJet and Air Canada. With an average price for the route of C$ 448 and an overall rating of 7.2, WestJet is the most popular choice. Air Canada is also a great choice for the route, with an average price of C$ 1,008 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from London to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from London to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from London to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from London to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
WestJetOverall score based on 3396 reviews
6.1Entertainment
6.2Food
7.9Crew
7.4Boarding
7.0Comfort
Airline reviews

I didn't think about not having the right app for wifi because my connecting flight was with Westjet and when I took off from Seattle I was thinking I would use my wifi, but realized I couldn't on my Westjet app and I did not have Delta's app downloaded.

6.0 GoodRachel, Jan 2026
SEA - SFO
Read more WestJet reviews

I didn't think about not having the right app for wifi because my connecting flight was with Westjet and when I took off from Seattle I was thinking I would use my wifi, but realized I couldn't on my Westjet app and I did not have Delta's app downloaded.

No dogs! Can we have no dogs in the cabin? Why was there a yappy little dog behind me? Lucky I had ear plugs. Sorry for others without

The staff at the airport and on the plane were wonderful I especially wanna acknowledge the staff who boarded us at the Calgary airport. The women who helped us board at the airport were incredible… they were so kind and sweet…I very happy with WestJet and I am hoping I can fly more often to Canada.

Absolutely terrible, from the customer service to boarding the plane. On the phone, there was some mishaps with getting in my correct date and they did not help me retrieve a refund or any assistance. I’m gonna be reporting to all my followers and family around the region of Los Angeles to New York.

Arrival at Comox from, London,ON 6 hours later... No bueano

Flight delayed, missed my pick-up had to Uber, plus missed dinner and medication, so sad!

Nothing to like because my inbound flight was cancelled without notification by West Jet or third party, JustFly. I couldn’t take the inbound flight due to cancellation; therefore could not take the outbound flight back.

Seat barely reclined. Boarding took forever. Flight attendants were not very friendly

I always worry about flying budget airlines but I was impressed by Westjet. The checkin agent was terrific. Seated my husband & me together w/o us asking. TSA checkin was smooth & easy. Plane was clean & comfortable. Drink & snack was unexpected. I will fly with them again.

I booked through westjet. The first flight left late and cost us the connection to the second flight. The second flight after a 4 hour delay was again late because they were short an attendant. Then a door malfunctioned on the plane which led to yet another plane. So by the time we left Calgary we missed the BC ferry and had to pay a charge to get a later one. It ended up being a 24 hour day. That wrecked our first day and part of the second day in BC because we were so overtired.

Aircraft is designed with all 3 washrooms at the back of the plane, meaning that when there is service underway, there are no washrooms available and it gets very crowded at the back of the plane.

The stag were helpful, kind and liked the passengers. The plane was pristinely clean! Great flight!

The staff was great and made the long trip easy peasy!

The free Wi-fi for Aeroplan members was a great touch. The time passed quickly. I found the seats seemed a little closer together than I remember. Not Air Canada's fault, but we were about 20 minutes late landing because the airport was too busy. We had to circle around for a while. The boarding and disembarking went very smoothly.

I liked the behaviour of the crew members.The flight was good.

Multiple change of the gates at Pearson, delayed flight was extremely uncomfortable.

Never made this leg of the flight since we rebooked through United instead. Did not make it to immigration/US custom due to the delay. Had to spend the night on our own dime in Toronto

Experienced flight cancelations and delays in 5 days. They seem pretty common to AC. Experienced with one of AC's check-in agents at the counter of a big liar. She lied and acted (yes like acting in a movie) that an early flight was fully booked and refused to rebook me, but my flight was delayed two hours so I could not make my connection. Later, I got help at the gate to switch the early flight (Big thanks to that agent). Ater boading, I found the early flight was only 2/3 full meaning there was almost one vacant seat in a 3-person seater, and multiple empty 3-seaters. AC is wired that it is filled with good and bad employees. BTW, AC employees seem never smile, or they don't know how.

Seating for almost 3 hours in the plan before aircraft takeoff. Very exhausted .

Once again my complaint is how close the seats are together. Also, the bathrooms were not very clean by the second half of the flight.

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

Information on your arrival and departure airports