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

Return flights

30 Jul - 20 Aug	United	direct
29 Jul - 14 Aug	Lufthansa
30 Jul - 14 Aug	Air Canada
29 Jul - 14 Aug	Lufthansa	direct
27 Jul - 11 Aug	United
30 Jul - 06 Aug	Virgin Atlantic
28 Jul - 07 Aug	United	direct
27 Jul - 12 Aug	United
28 Jul - 06 Aug	United	direct
27 Jul - 12 Aug	United	direct
27 Jul - 31 Jul	Scandinavian Airlines
29 Jul - 31 Jul	Scandinavian Airlines
27 Jul - 31 Jul	British Airways	direct
29 Jul - 31 Jul	British Airways	direct

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 543€

Return flights