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382 € Cheap Flights from San Francisco International to London Heathrow

Compare San Francisco International to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

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Flight deals from San Francisco International to London Heathrow

Looking for a cheap last-minute deal or the best return flight from San Francisco International to London Heathrow? Find the lowest prices on one-way and return tickets right here.
London.382 € per passenger.Departing Wed, 26 Nov, returning Thu, 4 Dec.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Wed, 26 Nov, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Thu, 4 Dec, arriving in San Francisco International.Price includes taxes and charges.From 382 €, select.
London.382 € per passenger.Departing Tue, 16 Sep, returning Mon, 22 Sep.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Tue, 16 Sep, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Mon, 22 Sep, arriving in San Francisco International.Price includes taxes and charges.From 382 €, select.
London.382 € per passenger.Departing Tue, 7 Oct, returning Wed, 22 Oct.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Tue, 7 Oct, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Wed, 22 Oct, arriving in San Francisco International.Price includes taxes and charges.From 382 €, select.
London.384 € per passenger.Departing Fri, 14 Nov, returning Sun, 23 Nov.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Fri, 14 Nov, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Sun, 23 Nov, arriving in San Francisco International.Price includes taxes and charges.From 384 €, select.
London.384 € per passenger.Departing Tue, 21 Oct, returning Tue, 4 Nov.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Tue, 21 Oct, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Tue, 4 Nov, arriving in San Francisco International.Price includes taxes and charges.From 384 €, select.
London.384 € per passenger.Departing Mon, 1 Dec, returning Thu, 11 Dec.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Mon, 1 Dec, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Thu, 11 Dec, arriving in San Francisco International.Price includes taxes and charges.From 384 €, select.
London.384 € per passenger.Departing Mon, 2 Feb, returning Sun, 15 Feb.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Mon, 2 Feb, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Sun, 15 Feb, arriving in San Francisco International.Price includes taxes and charges.From 384 €, select.
London.388 € per passenger.Departing Wed, 15 Oct, returning Thu, 11 Dec.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Wed, 15 Oct, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departs from London Heathrow on Thu, 11 Dec, arriving in San Francisco International.Price includes taxes and charges.From 388 €, select.

Find the cheapest month to fly from San Francisco International to London Heathrow

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Francisco International to London Heathrow flights are currently cheapest in September.
Jul
Find prices
Aug
from 398 €
Sep
from 382 €
Oct
from 382 €
Nov
from 384 €
Dec
from 384 €
Jan
from 391 €
Feb
from 384 €
Mar
from 497 €
Apr
from 535 €
May
from 541 €
Jun
from 717 €

Direct flights from San Francisco International to London Heathrow

San Francisco International to London Heathrow: Alternative routes

Compare routes from San Francisco International to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Heathrow.

San Francisco to London: Flight information

The things to know before you go.
Cheapest flight found382 €
Cheapest month to flySeptember
Average flight time10 hrs, 26 mins
Most popular airlineAir New Zealand
Average flights per week234

Finding cheap flights from San Francisco International to London Heathrow: Frequently asked questions

The best price we found for a return flight from San Francisco International to London Heathrow is 382 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
10 hours and 26 minutes is the average flight time from San Francisco International to London Heathrow.
Air New Zealand, SWISS and Air Canada fly direct from San Francisco International to London Heathrow.
As of July 2025, there are 234 flights per week flying from San Francisco International to London Heathrow.
The cheapest month to fly from San Francisco International to London Heathrow is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to London Heathrow Airport on Tuesday, 16 September 2025.
Yes – the average flight time is 10 hours and 26 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London Heathrow but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, TAP Air Portugal and British Airways offer the cheapest flight tickets to London Heathrow.

Flying from San Francisco International Airport (SFO) to London Heathrow Airport (LHR): what you need to know

  • Jump on a direct flight from San Francisco International Airport to London Heathrow Airport and you'll be in the air for an average of 10 hours 25 minutes.

  • London is seven hours ahead of San Francisco and is in the UTC+0 timezone.

  • Flights from SFO to LHR start from 12:30 — the earliest with United Airlines. The latest departure is at 22:15 with Virgin Atlantic. In total, you can take your pick of 62 weekly San Francisco International Airport to London Heathrow Airport flights.

  • Leave plenty of time to make your SFO to LHR flight. As a rule of thumb, arrive two hours before international departures and an hour ahead for domestic flights.

  • You can expect bigger queues during popular months such as August. Arriving up to four hours in advance for international flights and two hours for domestic departures is a wise move.

  • You'll find a variety of airlines offering direct flights from San Francisco International Airport to London Heathrow Airport. When you're ready to start your London adventure, let one of these carriers transport you to this unmissable part of United Kingdom:

  • British Airways is the most frequently booked airline on this route.

  • The most punctual carrier that offers SFO to LHR flights is United Airlines. Its services arrive as scheduled 77.59% of the time.

  • Think about adding a stopover when booking your ticket from San Francisco International Airport to London Heathrow Airport. Just uncheck 'Direct flights only' to break up your journey, or perhaps explore a new destination along the way. Here are some options between SFO and LHR:

    • Chhatrapati Shivaji International Airport

    • Kempegowda International Airport

    • Seattle-Tacoma International Airport

How to find the cheapest flights from San Francisco International Airport (SFO) to London Heathrow Airport (LHR)

  • At the moment, 184 € is the lowest price we've seen for a one-way San Francisco International Airport to London Heathrow Airport flight. The best price for a return plane ticket is 382 €. Remember that fares can change due to demand at the time of booking.

  • Score cheap tickets from SFO to LHR by booking eight months ahead. According to our research, that's the sweet spot for bagging a bargain.

  • July is the cheapest month for flights from San Francisco International Airport to London Heathrow Airport. If you're looking to travel at a different time of year, the 'Whole month' tool will give you the lowest prices for each month.

  • Stay on top of deals for cheap flights from SFO to LHR by creating a Price Alert. You'll receive an email or notification on the app when fares go down.

  • Choose your preferred departure and arrival times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from San Francisco International Airport to London Heathrow Airport.

Handy information about San Francisco International Airport (SFO)

  • When it comes to San Francisco International Airport's on-time performance, data shows 77.36% of flights complete their journey on time.

  • To get to San Francisco International Airport from central San Francisco, it'll take about 20 minutes by car. Of course, this depends on traffic conditions. It's approximately 21 kilometres from the airport to the city centre.

  • The journey on public transport takes roughly 45 minutes.

  • Booked an early flight from San Francisco International Airport to London Heathrow Airport? Avoid the hassle of rushing to the airport (and sneak in some extra precious sleep) by picking one of these stays close to SFO:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • From London Heathrow Airport, London is approximately 31 kilometres away. It takes around 55 minutes to get to the centre driving.

  • It typically takes 1 hour when travelling by public transport.

When to fly to London Heathrow Airport (LHR)

  • The quietest month for a flight from San Francisco International Airport to London Heathrow Airport is February, while July is the busiest. Pick the ideal time to go to London based on whether you prefer a faster pace or a more relaxed vibe.

  • Lock in your flight from San Francisco International Airport to London Heathrow Airport for July if you'd like to visit London during its warmest month. Expect temperatures of between 11ºC (52ºF) and 26ºC (79ºF).

  • Search for cheap tickets from SFO to LHR in January if you want to travel in cooler conditions. Temperatures are at their lowest around then, ranging between 0ºC (32ºF) and 9ºC (48ºF) on average.

Explore more of United Kingdom

  • Birmingham is just one of the many cities in United Kingdom waiting to be discovered after you've experienced London. Around 161 kilometres away to the north-west, well-known attractions include Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • Around 177 kilometres west of London, Bristol is another favourite stop in United Kingdom. Start your sightseeing at Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.

More travel options

Plan the rest of your trip from San Francisco to London

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.