Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to San Francisco from C$ 700

LHR — SFO
14 Oct — 21 Oct1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or September, booked 23 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to San Francisco

Fri 23/108:40 a.m. -
1 stop15h 55m
Mon 26/102:45 p.m. -
1 stop14h 05m
Deal found 12/9C$ 700
Mon 26/106:35 a.m. -
1 stop21h 00m
Sat 7/114:25 p.m. -
1 stop13h 05m
Deal found 12/9C$ 707
Fri 25/91:00 p.m. -
Nonstop11h 05m
Sat 10/1012:55 p.m. -
Nonstop10h 30m
Deal found 14/9C$ 753
Sat 19/99:30 a.m. -
1 stop19h 17m
Wed 30/96:15 a.m. -
1 stop19h 25m
Deal found 12/9C$ 757
Sun 27/99:30 a.m. -
1 stop19h 17m
Tue 13/104:45 p.m. -
Nonstop10h 25m
Deal found 14/9C$ 759
Sun 4/101:05 p.m. -
1 stop17h 47m
Sun 11/107:45 p.m. -
Nonstop10h 25m
Deal found 12/9C$ 760
Mon 21/91:05 p.m. -
1 stop14h 04m
Mon 12/107:45 p.m. -
Nonstop10h 25m
Deal found 14/9C$ 761
Mon 5/108:20 a.m. -
1 stop15h 17m
Mon 12/107:30 p.m. -
Nonstop10h 25m
Deal found 11/9C$ 763
Sat 19/99:30 a.m. -
1 stop19h 17m
Sat 26/911:39 p.m. -
1 stop26h 21m
Deal found 11/9C$ 764
Thu 24/911:25 a.m. -
1 stop19h 26m
Wed 7/108:10 a.m. -
1 stop14h 20m
Deal found 13/9C$ 766
Wed 23/92:50 p.m. -
2 stops16h 05m
Fri 9/109:05 p.m. -
1 stop14h 35m
Deal found 13/9C$ 767
Sun 4/101:05 p.m. -
1 stop18h 54m
Thu 15/1012:55 p.m. -
Nonstop10h 30m
Deal found 14/9C$ 768

Find flight deals from Heathrow to San Francisco

Round-trip from

C$ 700

Popular in

December

Cheapest in

February

Average price

C$ 925

Good round-trip deal

C$ 3,880 or less

Good one-way deal

C$ 3,055 or less
United Airlines
  • United Airlines
  • 23/10-26/10
  • 1 total stop
  • 26h 30m total
  • London to San Francisco
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to San Francisco.
Search Deals
Price to beat on a one-way flight from London Heathrow to San Francisco.
Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Wed 21/10

8:40 a.m.-4:15 p.m.

1 stop15h 35m

San Francisco

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 720

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Sat 31/10

7:30 a.m.-11:56 p.m.

2 stops23h 26m

San Francisco

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 723

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Sat 7/11

11:45 a.m.-2:55 p.m.

Nonstop11h 10m

San Francisco

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 745

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Thu 15/10

1:00 p.m.-4:00 p.m.

Nonstop11h 00m

San Francisco

Thu 22/10

12:55 p.m.-7:25 a.m.

Nonstop10h 30m

C$ 753

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Thu 1/10

8:50 a.m.-3:50 p.m.

1 stop15h 00m

San Francisco

Thu 8/10

1:28 p.m.-11:05 a.m.

1 stop13h 37m

C$ 759

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Thu 29/10

10:05 a.m.-2:20 p.m.

Nonstop11h 15m

San Francisco

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 760

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Wed 4/11

11:35 a.m.-8:10 p.m.

2 stops16h 35m

San Francisco

Sun 8/11

4:25 p.m.-1:30 p.m.

1 stop13h 05m

C$ 760

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Thu 1/10

1:00 p.m.-4:05 p.m.

Nonstop11h 05m

San Francisco

Thu 8/10

12:28 p.m.-10:10 a.m.

1 stop13h 42m

C$ 760

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Fri 15/1

1:45 p.m.-4:55 p.m.

Nonstop11h 10m

San Francisco

Fri 22/1

12:50 p.m.-7:25 a.m.

Nonstop10h 35m

C$ 767

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Sat 9/1

11:45 a.m.-2:55 p.m.

Nonstop11h 10m

San Francisco

Fri 22/1

1:23 p.m.-11:10 a.m.

1 stop13h 47m

C$ 767

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Heathrow to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Heathrow with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

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

How far ahead should I book a flight from London Heathrow Airport to San Francisco?

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to San Francisco, you should look to book at least 22 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London Heathrow Airport to San Francisco?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of C$ 850). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of C$ 1,214). 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.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to San Francisco as you normally would.

How much does it cost to fly round-trip from London Heathrow Airport to San Francisco?

Airfare is below average for this route at the moment.

London Heathrow Airport to San Francisco flights typically cost between C$ 813 and C$ 1,072 in October.
The cheapest round-trip price found within the last 5 days was C$ 700 on United Airlines (23 Oct-26 Oct).

Reviews of airlines servicing San Francisco

See what other customers who have flown with Lufthansa from London Heathrow Airport to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Lufthansa
6.8
Okay
8,222 reviews
Check prices

Overall

6.8

Comfort

6.8

Boarding

7.0

Entertainment

6.5

Food

6.3

Crew

7.6

Reviews

1 / 20
4.0
Okay

Djermouli,Dec 2025

FRA - SFO

I’m sorry the worst airline united food sales I’m diabetic plus high cholesterol pls seats it’s not comfortable plus screen tv broke I try to charge my phone don’t work I’m not flying with united airlines
Lufthansa
6.8
Okay
8,222 reviews
Lufthansa
6.8
Okay
8,222 reviews
Check prices

Overall

6.8

Comfort

6.8

Boarding

7.0

Entertainment

6.5

Food

6.3

Crew

7.6

Reviews

1 / 20
4.0
Okay

Djermouli,Dec 2025

FRA - SFO

I’m sorry the worst airline united food sales I’m diabetic plus high cholesterol pls seats it’s not comfortable plus screen tv broke I try to charge my phone don’t work I’m not flying with united airlines

Related info for your journey

  • What airport do you fly into for flights to San Francisco from London Heathrow?

    For a flight from London Heathrow to San Francisco, you will be flying into San Francisco. San Francisco (SFO) is just 17.7 km from the centre of the city. San Francisco is the only San Francisco airport and it handles 37 inbound flights from London Heathrow per day. 1 airline has flights to San Francisco from London Heathrow on a regular basis.

  • How long is the flight from London Heathrow Airport to San Francisco?

    A quick flight from London Heathrow Airport to San Francisco can take about 15h. British Airways provides one of the quickest options available for as low as C$ 759. Airlines will cover a distance of 8610 km. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from London Heathrow Airport to San Francisco round-trip?

    Cheapflights users have booked flights from London Heathrow Airport to San Francisco round-trip from C$ 1,666.

  • What are the most reliable airlines from London Heathrow Airport to San Francisco?

    Consider Air Canada (73%), Austrian Airlines (73%) or United Airlines (73%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to San Francisco.

  • What are the cheapest flights from London Heathrow Airport to San Francisco?

    Looking for the cheapest flight from London Heathrow Airport to San Francisco? While on average our users pay C$ 3,468, our data indicates the cheapest price to be C$ 2,996. The most popular route (London Heathrow - San Francisco), is priced around C$ 904.

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

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

  • How can I find direct flights from Heathrow to San Francisco?

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

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

    Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow Airport to San Francisco?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of C$ 850). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of C$ 1,214). 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

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Clara
Burlingame
San Bruno
Roseville
Livermore
South San Francisco
Novato
Manteca
Vallejo

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Heathrow to San Francisco

AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapestC$ 1,666AverageC$ 1,685FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to San Francisco?

Cheapflights makes it easy to find Heathrow to San Francisco flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Francisco?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to San Francisco for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to San Francisco with no change fees?

Yes, we can. To see specific flights from Heathrow to San Francisco with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Heathrow to San Francisco become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to San Francisco flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.