Cheap flights from San Francisco to London Heathrow
San Francisco to London Heathrow (SFO → LHR). We are tracking 19 fares on this route.
Cheapest tracked fare $274 · typical price $722 · you save about $448 (62%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
United Airlines
2026-11-03
1 stop
$274
Air Canada
2026-12-30
1 stop
$311
Aer Lingus
2026-11-24
1 stop
$323
WestJet
2026-10-13
1 stop
$330
Aer Lingus
2026-09-06
1 stop
$338
Aer Lingus
2026-09-14
1 stop
$338
Aer Lingus
2026-09-16
1 stop
$338
Aer Lingus
2026-09-20
1 stop
$338
Aer Lingus
2026-09-27
1 stop
$338
Aer Lingus
2026-09-29
1 stop
$338
JetBlue
2026-09-19
1 stop
$344
JetBlue
2026-09-26
1 stop
$344
JetBlue
2026-09-09
1 stop
$345
JetBlue
2026-09-11
1 stop
$351
JetBlue
2026-09-24
1 stop
$351
JetBlue
2026-09-25
1 stop
$351
Air Canada
2026-12-31
1 stop
$361
Frontier Airlines
2026-09-15
3 stops
$374
ITA Airways
2026-09-22
1 stop
$378
Could you save more?
The airport you were going to fly from is often not the cheapest one. Compare every airport in a region against each other, or check whether a multi-day stopover beats the direct fare.
How cheap can flights from San Francisco to London Heathrow get?
The cheapest fare we have tracked on this route is $274, compared with a typical $722 for a trip of this distance.
Is it cheaper to fly to London Heathrow from a different airport?
Often, yes. Fares out of secondary airports are frequently cheaper than the obvious hub, but they are the ones most likely to be missing from a normal search. Our reverse search compares every airport in a region against each other so the cheaper departure point is not hidden.
Could a stopover make San Francisco to London Heathrow cheaper?
Sometimes. On thin long-haul routes a two-leg trip with a multi-day stopover can beat the direct fare, and occasionally a direct fare is not sold at all. Our detour search prices those routings against the direct flight.