San Francisco International (SFO) to Heathrow (LHR). Served by British Airways, United, Virgin Atlantic.
| Departure | Return | Price |
|---|---|---|
| 08/04/2026 | 08/13/2026 | $885 |
| 08/05/2026 | 08/13/2026 | $885 |
| 08/05/2026 | 08/14/2026 | $886 |
| 08/03/2026 | 08/12/2026 | $919 |
| 08/04/2026 | 08/12/2026 | $919 |
| 08/05/2026 | 08/12/2026 | $919 |
| 08/02/2026 | 08/11/2026 | $969 |
| 08/03/2026 | 08/11/2026 | $969 |
| 05/21/2026 | 05/26/2026 | $980 |
| 05/21/2026 | 05/27/2026 | $980 |
Based on current fares, August is the cheapest month to fly from San Francisco to London, with average fares around $940 round trip (as low as $885).
See the full month-by-month and day-of-week price analysis
Best Time to Fly SFO → LHRDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from San Francisco to London is August, with average round-trip fares around $940. Fares in August start as low as $885. The most expensive month is June, averaging $1115.
A nonstop flight from San Francisco to London takes approximately 10h 30m.
British Airways, United, and Virgin Atlantic fly from SFO to LHR. That's 3 airlines serving this route.
The cheapest flight from San Francisco to London currently starts at $885 round trip in economy class.
The average round-trip flight price from San Francisco to London is $1139 in economy class.
The distance is 5367 miles (8636 km). with a nonstop flight time of about 10h 30m. Airlines on this route include British Airways, United, Virgin Atlantic. The lowest fare currently available is $885 departing in August. The average round-trip fare is $1139.
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