Cheap Flights from San Francisco to London
Compare indicative cheapest fares from San Francisco (SFO) to London (LHR) — currently from $274. Check airlines, flight times and the cheapest days to fly, then book with our travel partner.
Search live San Francisco → London faresFares from
$274
Fastest trip
11h 10m
Airlines
3+ carriers
Cheapest San Francisco to London fares right now
Fares are indicative (updated periodically) and confirmed on our partner’s site. We may earn a commission when you book through our links, at no extra cost to you.
Airlines flying San Francisco to London
On the San Francisco to London route you will typically find fares from UA, AC, WS. Comparing a few carriers is the surest way to catch the cheapest flights, since the lowest fare shifts between airlines by the day.
Tips for the cheapest San Francisco–London fare
- • Fly mid-week — Tuesday and Wednesday departures are usually cheapest.
- • Our data shows lower fares around November — target that window if you can.
- • Book a few weeks to two months ahead rather than last-minute.
- • Set a price alert and compare non-stop vs one-stop options.
San Francisco to London flights — FAQs
How much is a cheap flight from San Francisco to London?
Indicative fares from San Francisco to London start from around $274 one-way. Prices change with the season and how far ahead you book — the cheapest deals we have on record for San Francisco (SFO) to London (LHR) currently sit near $274.
Which airlines fly from San Francisco to London?
Carriers offering fares on the San Francisco to London route include UA, AC, WS. Availability changes daily, so compare the live options below before you book.
How long is the flight from San Francisco to London?
The quickest itineraries we see on San Francisco to London take about 11h 10m. Times vary by airline and number of stops.
When is the cheapest time to fly from San Francisco to London?
Our data currently shows the lowest San Francisco–London fares around November. As a rule, mid-week departures (Tuesday and Wednesday) and booking a few weeks to a couple of months ahead give you the cheapest flights on this route. Set a price alert and stay flexible on dates to save the most.
Where can I book cheap flights from San Francisco to London?
Compare the indicative cheapest fares below, then tap "Book" to complete your San Francisco to London booking on our trusted travel partner's site. Fares shown are indicative and confirmed at checkout.