London to San Francisco is one of the most popular transatlantic routes to the US West Coast, and it is a comfortable non-stop of around 11 hours. British Airways, Virgin Atlantic and United all fly the route direct from Heathrow, so you rarely need to connect. This guide covers who flies it, what a fair return fare looks like in pounds, and when to book to save.
Route: London (LHR) → San Francisco International (SFO)
Distance: approximately 8,600 km (5,350 miles)
Non-stop flight time: about 11h 05m westbound; roughly 10h 25m on the way home with the jet stream
Direct flights: Yes — British Airways, Virgin Atlantic and United all fly non-stop from London Heathrow. One-stop fares can undercut them but add several hours.
Fares from London to San Francisco (GBP)
San Francisco is a year-round destination, but fares track the North American summer and the US holidays. June to August and the Christmas period are the busiest and dearest; the shoulder months of spring and autumn offer the best value. The figures below are typical economy return fares in pounds — the lowest are usually early-booked or one-stop, with peak-summer non-stops sitting toward the top.
| Month | Typical return (economy) | Demand |
|---|---|---|
| January | £470 – £620 | low |
| February | £470 – £620 | low |
| March | £500 – £660 | medium |
| April | £520 – £690 | medium |
| May | £540 – £720 | medium-high |
| June | £620 – £820 | high |
| July | £660 – £880 | very high |
| August | £640 – £860 | very high |
| September | £540 – £720 | medium-high |
| October | £510 – £680 | medium |
| November | £490 – £650 | medium |
| December | £620 – £850 | high (holidays) |
Reference points from our own deal tracking: a genuinely good non-stop return lands around £380–£490, a typical fair price is roughly £490, and everyday fares sit near £540–£560. Anything under about £450 return is worth booking quickly.
Airlines on this route
Non-stop (about 11 hours):
- British Airways — multiple daily non-stops from Heathrow; the most frequent option and easy to pair with connections.
- Virgin Atlantic — daily non-stop from Heathrow, well-regarded economy and premium cabins.
- United Airlines — daily non-stop from Heathrow to its San Francisco hub, with wide onward US connections.
One-stop (sometimes cheaper, about 14–17 hours total):
- Air France via Paris and KLM via Amsterdam — frequent European connections, often good value.
- Lufthansa via Frankfurt or Munich, and other US carriers via East Coast hubs — usually the lowest headline fares when the non-stops are pricey.
Because three airlines fly non-stop, competition keeps direct fares reasonable outside peak summer. A one-stop routing can save money in July and August, but the time cost is real — weigh the saving against several extra hours.
When to book & how to save
- Book 2–4 months ahead for the best balance of price and choice; transatlantic fares to California rarely fall in the final weeks.
- Avoid peak summer and Christmas if you can — late spring and autumn (April–May, September–October) offer the best weather-to-price balance.
- Fly midweek — Tuesday and Wednesday departures are usually cheaper than weekend ones.
- Check the baggage allowance: full-service non-stops include a checked bag on most fares, but the cheapest “basic” transatlantic tickets may not, so compare the all-in price.
- Set a price alert around the £450–£490 mark — that is a strong non-stop fare on this route.
Arriving in San Francisco
All non-stops land at San Francisco International (SFO), about 21 km south of downtown. The easiest way in is BART (the Bay Area rail system) directly from the International Terminal to the city centre in around 30 minutes for roughly £8–£9. A taxi or ride-share to downtown runs about £40–£60 depending on traffic. SFO is also a gateway for onward trips to Napa, Yosemite and Silicon Valley.
Frequently asked questions
How long is the flight from London to San Francisco?
Non-stop flights take about 11 hours 5 minutes westbound from London to San Francisco, and a little less, around 10 hours 25 minutes, on the way home thanks to tailwinds. One-stop itineraries via Europe or a US hub typically take 14 to 17 hours in total.
Are there direct flights from London to San Francisco?
Yes. British Airways, Virgin Atlantic and United Airlines all fly non-stop from London Heathrow to San Francisco, with multiple departures a day between them. One-stop options via Paris, Amsterdam or Frankfurt exist and can be cheaper in peak season, but they add several hours.
How much does it cost to fly from London to San Francisco?
A typical economy return runs about £490–£700 depending on the season. Good non-stop deals dip to around £380–£490, usually in winter and the spring or autumn shoulders, while July, August and Christmas push fares toward £850.
What is the cheapest month to fly from London to San Francisco?
January, February and November are usually the cheapest, with returns from around £470. Avoid July and August and the Christmas holidays, which are the busiest and most expensive on this route.
Which airlines fly from London to San Francisco?
Non-stop: British Airways, Virgin Atlantic and United Airlines, all from Heathrow. One-stop: Air France (via Paris), KLM (via Amsterdam) and Lufthansa (via Frankfurt or Munich), which can be cheaper when the direct fares are high.
Which airport do I fly into in San Francisco?
You arrive at San Francisco International (SFO), the main gateway about 21 km south of the city. It connects directly to central San Francisco by BART rail. Oakland (OAK) and San Jose (SJC) also serve the Bay Area but are not used by the London non-stops.
How far in advance should I book London to San Francisco flights?
Aim to book 2 to 4 months ahead. Transatlantic fares to California tend to rise as departure approaches, particularly for summer and the Christmas peak, so early booking almost always wins on this route.
Is it cheaper to fly on weekdays?
Often, yes — midweek departures (Tuesday and Wednesday) are usually cheaper than Friday to Sunday, and flying out and back on weekdays can save £40–£100 on a return. Being flexible by a day or two is one of the easiest ways to cut the fare.
Fare guidance based on aifly.one deal tracking and current airline schedules; last reviewed July 2026. Indicative economy returns — always check the live fare before booking.
