AirHint found the following cheapest return flights from San Francisco (SFO) to London (LHR) in July 2025 (see full year).

Return flights

27 Jul - 21 Aug	Air Canada
29 Jul - 12 Aug	SWISS
23 Jul - 13 Aug	SWISS
28 Jul - 14 Aug	SWISS
29 Jul - 14 Aug	Air Canada
22 Jul - 15 Aug	British Airways
22 Jul - 08 Aug	Delta
23 Jul - 29 Jul	Delta
29 Jul - 05 Aug	Delta
27 Jul - 08 Aug	Delta
27 Jul - 05 Aug	American Airlines
14 Jul - 22 Jul	Delta
09 Jul - 23 Jul	Delta
09 Jul - 22 Jul	American Airlines
14 Jul - 29 Jul	Delta
16 Jul - 25 Jul	Delta
15 Jul - 24 Jul	Delta
15 Jul - 22 Jul	Virgin Atlantic
08 Jul - 22 Jul	Delta
22 Jul - 29 Jul	British Airways

Also check the deals for one-way flights from San Francisco to London in July.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from San Francisco to London in July from $479

Return flights