Flights from London (LHR) to San Francisco (SFO)
Compare fares. Direct flights available from £711.53 with Alaska Airlines.
11h 0m
5368 miles
Available
£711.53
Today's Live Prices
Fares updated 2026-10-28 00:00:00 → 2026-11-04 00:00:00 · Round trip · Economy · 1 adult
Alaska Airlines
Alaska Airlines
1 PC
7 kg
Alaska Airlines
Alaska Airlines
1 PC
7 kg
Alaska Airlines
Alaska Airlines
1 PC
7 kg
Alaska Airlines
Alaska Airlines
1 PC
7 kg
Alaska Airlines
Alaska Airlines
1 PC
7 kg
Seasonal Travel Tips
- Autumn (September-October) is San Francisco's warmest and sunniest season — a great value window.
- Red-eye departures from London let you land refreshed in the mid-morning.
Frequently Asked Questions
How long is the flight from London Heathrow to San Francisco?
A direct flight from London Heathrow to San Francisco International Airport (SFO) takes about 11 hours. Connecting itineraries commonly add 2-3 hours depending on the hub.
Which airlines fly direct from London to San Francisco?
British Airways, United Airlines and Virgin Atlantic operate direct flights between London Heathrow and San Francisco. All offer premium economy and business cabins on this long sector.
What is the cheapest time to fly to San Francisco?
January, February and early December tend to offer the lowest fares. The summer months of July and August are the most expensive due to peak tourist demand.
What sets San Francisco arrivals apart?
SFO has one of the smoothest US immigration processes, with a Global Entry kiosk network and well-organised baggage reclaim. Expect cool, foggy weather even in summer — pack layers.