$245 Cheap Flights from San Francisco (SFO) to London (LHR)

View $245 flight on Sun, Feb 1, 2026Opens in a new window

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

Today's featured flight deals from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)

Nonstop
Carry-on included
Lower price than typical

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

Prices were available within the past 7 days and start at $245 for one-way flights and $449 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Wed, Dec 3 - Wed, Dec 10
SFO
San Francisco
LHR
London
$449 Roundtrip, just found
$449
Roundtrip
just found
Select TAP Portugal flight, departing Wed, Dec 3 from San Francisco to London, returning Wed, Dec 10, priced at $449 just found
Aer Lingus
Wed, Oct 29 - Wed, Nov 19
SFO
San Francisco
LHR
London
$560 Roundtrip, found 1 day ago
$560
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Wed, Oct 29 from San Francisco to London, returning Wed, Nov 19, priced at $560 found 1 day ago
Virgin Atlantic
Wed, Dec 31 - Tue, Jan 13
SFO
San Francisco
LHR
London
$578 Roundtrip, found 1 hour ago
$578
Roundtrip
found 1 hour ago
Select Virgin Atlantic flight, departing Wed, Dec 31 from San Francisco to London, returning Tue, Jan 13, priced at $578 found 1 hour ago
Delta
Mon, Dec 1 - Tue, Dec 9
SFO
San Francisco
LHR
London
$578 Roundtrip, just found
$578
Roundtrip
just found
Select Delta flight, departing Mon, Dec 1 from San Francisco to London, returning Tue, Dec 9, priced at $578 just found
Scandinavian Airlines
Sun, Feb 1 - Sat, Feb 28
SFO
San Francisco
LHR
London
$584 Roundtrip, just found
$584
Roundtrip
just found
Select Scandinavian Airlines flight, departing Sun, Feb 1 from San Francisco to London, returning Sat, Feb 28, priced at $584 just found
American Airlines
Mon, Nov 24 - Thu, Dec 4
SFO
San Francisco
LHR
London
$585 Roundtrip, just found
$585
Roundtrip
just found
Select American Airlines flight, departing Mon, Nov 24 from San Francisco to London, returning Thu, Dec 4, priced at $585 just found
Iberia
Wed, Feb 25 - Wed, Mar 4
SFO
San Francisco
LHR
London
$593 Roundtrip, found 1 hour ago
$593
Roundtrip
found 1 hour ago
Select Iberia flight, departing Wed, Feb 25 from San Francisco to London, returning Wed, Mar 4, priced at $593 found 1 hour ago
United
Tue, Nov 25 - Wed, Dec 3
SFO
San Francisco
LHR
London
$604 Roundtrip, just found
$604
Roundtrip
just found
Select United flight, departing Tue, Nov 25 from San Francisco to London, returning Wed, Dec 3, priced at $604 just found
Lufthansa
Tue, Dec 9 - Thu, Dec 25
SFO
San Francisco
LHR
London
$612 Roundtrip, found 2 hours ago
$612
Roundtrip
found 2 hours ago
Select Lufthansa flight, departing Tue, Dec 9 from San Francisco to London, returning Thu, Dec 25, priced at $612 found 2 hours ago
Swiss International Air Lines
Tue, Nov 11 - Mon, Nov 17
SFO
San Francisco
LHR
London
$615 Roundtrip, just found
$615
Roundtrip
just found
Select Swiss International Air Lines flight, departing Tue, Nov 11 from San Francisco to London, returning Mon, Nov 17, priced at $615 just found

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

January is typically the cheapest month to fly

From $448 - $950 per traveler.

Alternative airports near London

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

Select flight to Gatwick LGW. Average driving time to city center is 52 minutes. Flights from $766
LGW
Gatwick
Average driving time to city center52 min
Flights from $766
Select flight to London City LCY. Closest option available. Average driving time to city center is 21 minutes. Flights from $924
LCY
London City
Closest
Average driving time to city center21 min
Flights from $924
Flights from San Francisco (SFO) to London (LHR)
Origin airport
San Francisco Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, 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
Roundtrip price
$448
Distance
5354 mi
Average flight time
17 hours 28 mins

San Francisco to London Flights

The cheapest times to fly from San Francisco to London

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 San Francisco to London are during the month of December. You can find some of the cheapest flights from San Francisco to London with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from San Francisco to London: 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 San Francisco to London

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 San Francisco to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $245 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 San Francisco to London 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 San Francisco to London 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 San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR) cost?
Get a cheap one-way flight from $245 or cheap return flight from $449 from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
Traveling in December can help you save, as it's the cheapest month for flights between SFO and LHR. You'll often find the lowest fares during off-peak months.
Which airlines fly direct from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
Pick from 3 airlines that fly direct from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR). These include:

  • United Airlines
  • British Airways
  • Virgin Atlantic

What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
The cheapest airline to offer flights between San Francisco Intl. Airport (SFO) and Heathrow Airport (LHR) can change depending on when you plan to fly. Virgin Atlantic and British Airways are just some good options offering reasonable prices. Use Expedia's search tool to compare airlines in one place and find the right SFO to LHR flight for your budget.
How many flights per day from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
When departing from San Francisco Intl. Airport (SFO), you can choose from an average of 4 daily nonstop flights to Heathrow Airport (LHR).
What are the most popular departure times for flights from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
More passengers fly between SFO and LHR at 5 PM than at any other point in the day. Rather skip the crowds? Pick a flight outside the busiest times and you could save on your ticket as well.
What day of the week has the most flights from SFO to LHR?
Thursday has the most flights from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR). Consider jetting off on this day and you'll have a greater chance of finding a departure that fits your schedule.
What is the earliest flight from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
The first flight of the day out of San Francisco Intl. Airport (SFO) is at around 12:50PM UTC-8. Hop on this flight and you'll reach Heathrow Airport (LHR) at approximately 7:25AM UTC+0. The total flight duration is 10h 35m.
How long does it take to fly from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
Flights from SFO to LHR have an average travel time of 10 hours and 29 minutes. The total distance between the two is 5,400 mi.
What airline has the least delays from SFO to LHR?
Consider traveling with Brussels Airlines if you'd like to fly straight from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR) without any delays. This carrier has the best track record for punctuality, with an on-time score of 88%. Want real-time updates? You can check your flight status using the Expedia App.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
Book a flight from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures later than this are on average 22% more likely to be canceled.**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 London from San Francisco Intl. Airport (SFO)?
Heathrow Airport (LHR) is the only airport in London with direct flights from San Francisco Intl. Airport (SFO). Check out your options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR) last-minute?
Waiting until just before your departure to book your flight from SFO to LHR often results in higher prices. Although you may find some last-minute offers, there's no guarantee. Keep your travel schedule open to boost your chances of getting a bargain.
Is it cheaper to book a SFO to LHR flight and hotel package?
Compared with arranging hotels and flights separately, booking a SFO to LHR flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place takes the hassle out of planning your trip. Simply secure your flights and select from our wide range of stays, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR)?
In most instances, you can cancel or reschedule your SFO to LHR flight. However, there may be additional fees, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you need further information, go to our Customer Service portal.

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*Available to One Key members.