$386 Cheap Flights from London (LHR) to San Francisco (SFO)

View $386 flight on Wed, May 21, 2025Opens in a new window

Popular airlines from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)

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

Prices were available within the past 7 days and start at $386 for one-way flights and $542 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Sun, Feb 1 - Sat, Feb 28
LHR
London
SFO
San Francisco
$542 Roundtrip, found 4 days ago
$542
Roundtrip
found 4 days ago
Select TAP Portugal flight, departing Sun, Feb 1 from London to San Francisco, returning Sat, Feb 28, priced at $542 found 4 days ago
Swiss International Air Lines
Sun, May 11 - Tue, May 20
LHR
London
SFO
San Francisco
$548 Roundtrip, just found
$548
Roundtrip
just found
Select Swiss International Air Lines flight, departing Sun, May 11 from London to San Francisco, returning Tue, May 20, priced at $548 just found
Lufthansa
Sun, May 11 - Tue, May 20
LHR
London
SFO
San Francisco
$550 Roundtrip, just found
$550
Roundtrip
just found
Select Lufthansa flight, departing Sun, May 11 from London to San Francisco, returning Tue, May 20, priced at $550 just found
Scandinavian Airlines
Sat, Oct 18 - Wed, Oct 29
LHR
London
SFO
San Francisco
$558 Roundtrip, found 5 days ago
$558
Roundtrip
found 5 days ago
Select Scandinavian Airlines flight, departing Sat, Oct 18 from London to San Francisco, returning Wed, Oct 29, priced at $558 found 5 days ago
Brussels Airlines
Thu, May 8 - Sat, May 17
LHR
London
SFO
San Francisco
$564 Roundtrip, just found
$564
Roundtrip
just found
Select Brussels Airlines flight, departing Thu, May 8 from London to San Francisco, returning Sat, May 17, priced at $564 just found
United
Fri, May 9 - Mon, May 19
LHR
London
SFO
San Francisco
$569 Roundtrip, found 23 hours ago
$569
Roundtrip
found 23 hours ago
Select United flight, departing Fri, May 9 from London to San Francisco, returning Mon, May 19, priced at $569 found 23 hours ago
Virgin Atlantic
Thu, May 8 - Tue, May 13
LHR
London
SFO
San Francisco
$577 Roundtrip, found 9 hours ago
$577
Roundtrip
found 9 hours ago
Select Virgin Atlantic flight, departing Thu, May 8 from London to San Francisco, returning Tue, May 13, priced at $577 found 9 hours ago
Delta
Thu, May 8 - Tue, May 13
LHR
London
SFO
San Francisco
$577 Roundtrip, found 9 hours ago
$577
Roundtrip
found 9 hours ago
Select Delta flight, departing Thu, May 8 from London to San Francisco, returning Tue, May 13, priced at $577 found 9 hours ago
Austrian Airlines
Sun, May 11 - Tue, May 20
LHR
London
SFO
San Francisco
$582 Roundtrip, just found
$582
Roundtrip
just found
Select Austrian Airlines flight, departing Sun, May 11 from London to San Francisco, returning Tue, May 20, priced at $582 just found
Air Canada
Sun, Jun 29 - Mon, Jul 14
LHR
London
SFO
San Francisco
$588 Roundtrip, found 1 day ago
$588
Roundtrip
found 1 day ago
Select Air Canada flight, departing Sun, Jun 29 from London to San Francisco, returning Mon, Jul 14, priced at $588 found 1 day ago
Flights from London (LHR) to San Francisco (SFO)
Origin airport
Heathrow
Destination airport
San Francisco Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic, WestJet
Roundtrip price
$541
Distance
5354 mi

London to San Francisco Flights

The cheapest times to fly from London to San Francisco

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from London to San Francisco are during the month of February. You can find some of the cheapest flights from London to San Francisco with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from London to San Francisco

Sunday is one of the best days to book for cheap flights from London to San Francisco: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from London to San Francisco

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from London to San Francisco in 2025. You can also book with separate airlines for your outbound and return journeys, from $386 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap London to San Francisco flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your London to San Francisco airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO) cost?
You can score cheap return tickets from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO) starting from $581. Book a seat and get ready to go. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Brussels Airlines flight leaving LHR on May 16 2025 and touching down at SFO. The price was last updated on April 28 2025 and has not changed since.
What is the cheapest month to fly from LHR to SFO?
The cheapest flights from LHR to SFO are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)?
Choose from 3 airlines that fly directly from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO). These include:

  • United Airlines
  • British Airways
  • Virgin Atlantic

What is the cheapest airline that flies from LHR to SFO?
With prices starting from $1355 for a one-way journey from LHR to SFO, Brussels Airlines is currently the cheapest airline for this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from LHR on July 11 2025. Prices were last updated on April 28 2025 and have not changed since.
How many flights per day from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)?
With an average of 4 direct flights that operate from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO) every day, you’ll be on your way in no time.
What are the most popular departure times for flights from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)?
Flights between LHR and SFO are busiest at 11 AM. For a quieter experience and possibly cheaper tickets, look for a time when demand is lower.
What day of the week has the most flights from LHR to SFO?
Jet off on a Thursday if you’re searching for the largest selection of flights from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO).
What is the earliest flight from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)?
The first flight of the day leaving from Heathrow Airport (LHR) is at around 10:05AM UTC+0. Board this flight and you’ll touch down at San Francisco Intl. Airport (SFO) at approximately 1:15PM UTC-8. The entire trip takes 11h 10m.
How long does it take to fly from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)?
Flights from LHR to SFO have an average travel time of 11 hours and 11 minutes. The distance between the two airports is 5,400 mi.
What is the best time to fly from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)?
Opt for a flight from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this hour have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for San Francisco from Heathrow Airport (LHR)?
If you’re boarding a direct flight from Heathrow Airport (LHR) to San Francisco, San Francisco Intl. Airport (SFO) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO) last-minute?
Booking your flight from LHR to SFO right before your journey is generally more expensive. But if you’re flexible with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a LHR to SFO flight and hotel package?
Compared with arranging hotels and flights separately, booking a LHR to SFO flight and hotel package with Expedia could result in significant savings. What’s more, having it all in one place takes the hassle out of travel planning. Simply secure your flights and choose from our extensive range of hotels, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)?
Typically, you’re able to reschedule or cancel your LHR to SFO flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline’s fees and rules on flight changes, or if you need more information, go to our Customer Service portal.

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*Available to One Key members.