$415 Cheap Flights from London (LHR) to San Francisco (SFO)

View $415 flight on Thu, Sep 11, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $415 for one-way flights and $438 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Sun, Nov 2 - Sat, Nov 29
LHR
London
SFO
San Francisco
$438 Roundtrip, found 1 day ago
$438
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Sun, Nov 2 from London to San Francisco, returning Sat, Nov 29, priced at $438 found 1 day ago
British Airways
Thu, Oct 23 - Sun, Nov 2
LHR
London
SFO
San Francisco
$482 Roundtrip, found 19 hours ago
$482
Roundtrip
found 19 hours ago
Select British Airways flight, departing Thu, Oct 23 from London to San Francisco, returning Sun, Nov 2, priced at $482 found 19 hours ago
Swiss International Air Lines
Tue, Oct 7 - Tue, Oct 21
LHR
London
SFO
San Francisco
$499 Roundtrip, found 16 hours ago
$499
Roundtrip
found 16 hours ago
Select Swiss International Air Lines flight, departing Tue, Oct 7 from London to San Francisco, returning Tue, Oct 21, priced at $499 found 16 hours ago
Lufthansa
Tue, Oct 7 - Tue, Oct 21
LHR
London
SFO
San Francisco
$500 Roundtrip, found 16 hours ago
$500
Roundtrip
found 16 hours ago
Select Lufthansa flight, departing Tue, Oct 7 from London to San Francisco, returning Tue, Oct 21, priced at $500 found 16 hours ago
Air Canada
Mon, Dec 1 - Fri, Dec 5
LHR
London
SFO
San Francisco
$505 Roundtrip, found 14 hours ago
$505
Roundtrip
found 14 hours ago
Select Air Canada flight, departing Mon, Dec 1 from London to San Francisco, returning Fri, Dec 5, priced at $505 found 14 hours ago
TAP Portugal
Fri, Nov 21 - Mon, Dec 1
LHR
London
SFO
San Francisco
$513 Roundtrip, found 19 hours ago
$513
Roundtrip
found 19 hours ago
Select TAP Portugal flight, departing Fri, Nov 21 from London to San Francisco, returning Mon, Dec 1, priced at $513 found 19 hours ago
United
Sun, Nov 16 - Wed, Nov 26
LHR
London
SFO
San Francisco
$519 Roundtrip, found 19 hours ago
$519
Roundtrip
found 19 hours ago
Select United flight, departing Sun, Nov 16 from London to San Francisco, returning Wed, Nov 26, priced at $519 found 19 hours ago
Virgin Atlantic
Tue, Oct 7 - Tue, Oct 21
LHR
London
SFO
San Francisco
$525 Roundtrip, found 16 hours ago
$525
Roundtrip
found 16 hours ago
Select Virgin Atlantic flight, departing Tue, Oct 7 from London to San Francisco, returning Tue, Oct 21, priced at $525 found 16 hours ago
Delta
Fri, Nov 21 - Mon, Dec 1
LHR
London
SFO
San Francisco
$525 Roundtrip, found 19 hours ago
$525
Roundtrip
found 19 hours ago
Select Delta flight, departing Fri, Nov 21 from London to San Francisco, returning Mon, Dec 1, priced at $525 found 19 hours ago
Brussels Airlines
Mon, Dec 1 - Fri, Dec 5
LHR
London
SFO
San Francisco
$531 Roundtrip, found 14 hours ago
$531
Roundtrip
found 14 hours ago
Select Brussels Airlines flight, departing Mon, Dec 1 from London to San Francisco, returning Fri, Dec 5, priced at $531 found 14 hours ago

Find the cheapest month to fly from London (LHR) to San Francisco (SFO)

January is typically the cheapest month to fly

From $466 - $959 per traveler.

Graph displaying average flight prices per month

Alternative airports near San Francisco

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Norman Y. Mineta San Jose Intl. SJC. Average driving time to city center is 50 minutes. Flights from $610
SJC
Norman Y. Mineta San Jose Intl.
Average driving time to city center50 min
Flights from $610
Select flight to Oakland Intl. OAK. Average driving time to city center is 26 minutes. Flights from $752
OAK
Oakland Intl.
Average driving time to city center26 min
Flights from $752
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
$437
Distance
5354 mi
Average flight time
3 hours 2 mins

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 November. 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 $415 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?
Get a cheap one-way flight from $415 or cheap return flight from $438 from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)?
November is the most affordable month to fly from LHR to SFO. Planning your trip for the off-season is often the key to scoring lower fares.
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 Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO)?
Virgin Atlantic and British Airways are some popular carriers offering competitive fares. Remember that flight prices from Heathrow Airport (LHR) to San Francisco Intl. Airport (SFO) can change depending on the time of year, demand and how early you book. With Expedia's search tool, you can easily find a LHR to SFO flight that fits your preferences and budget.
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.