Long haul · City · Tech. Compare cheap flights to San Francisco from UK airports — flight time 10h 30m from London.
San Francisco is a long-haul destination from the UK — around 10h 30m in the air from London, which makes it a realistic one- to two-week trip. Travellers come for the tech scene. Returns from around £420 are typical when booked ahead.
Most visitors aim for Sep–Nov. Typical advance returns sit around £420. On the ground, US dollar (USD) is the local currency and English the dominant language — English coverage is solid in tourist quarters and at the airport. Visa: ESTA required — apply online before travel, $21, valid 2 years. 8–14 weeks ahead is the long-haul sweet spot — earlier doesn't reliably help, later starts to hurt; last-minute bookings can run two to three times the advance fare.
Direct answer. Return fares to San Francisco typically start around £420 when booked ahead — it's a long-haul route, roughly 10h 30m in the air from London.
8–14 weeks ahead is the long-haul sweet spot — earlier doesn't reliably help, later starts to hurt. Last-minute bookings are where this route punishes you — waiting until inside two weeks of departure usually costs well over the advance fare.
Key fact: A typical advance return to San Francisco is around £420; flight time from London is about 10h 30m.
Direct answer. Book 8–14 weeks ahead, and aim for Sep–Nov if you want San Francisco at its best — that window balances weather and crowds rather than chasing a mythical cheapest day.
Before you commit, the admin: ESTA required — apply online before travel, $21, valid 2 years. Currency is US dollar (USD); English is the main language, with English widely understood in tourist areas.
Key fact: Best months to visit San Francisco: Sep–Nov. Flight time from London: about 10h 30m.
Direct flights from London to San Francisco take approximately 10h 30m. Total journey time depends on your departure airport and any connections.
ESTA required — apply online before travel, $21, valid 2 years
The best months to visit San Francisco are Sep–Nov, when conditions are most comfortable for sightseeing and weather is settled.
US dollar (USD) — most major hotels and restaurants in San Francisco accept card payments, but cash is useful for smaller establishments and tipping.
English. English is widely understood in tourist areas, hotels, and major restaurants.
