British Airways Flights from London to San Francisco

At the moment, you can catch a direct flight from London to San Francisco with the following airlines, including: United Airlines Virgin Atlantic Lufthansa British Airways Delta Air Lines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

A flight from London (LON) to San Francisco (SFO) takes an average of 11 hours 6 minutes.

By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from London to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

On average, 43 direct flights operate each week between London and San Francisco. See below the schedules of the main airlines serving this route:
Alaska Airlines: S/M/T/W/T/F/S – AS5277 (departure at 14:45) Air Canada: S/M/T/W/T/F/S – AC3716 (departure at 16:37)

The cheapest month to book a flight from London to San Francisco is usually September, when demand is lower.

After crunching the numbers on our September flight calendar, it's currently cheapest to fly from London to San Francisco on September 23, 2026 with SWISS, with prices starting at £343.

Flights to San Francisco can arrive at: San Francisco International Airport (SFO). The most common route connects Heathrow Airport and San Francisco International Airport (LHR–SFO).

The time difference between San Francisco and London is 8h.

Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.