AirHint found the following cheapest return flights from San Jose (SJC) to London (LHR) in August 2025 (see full year).

Return flights

17 Aug - 28 Aug	Delta
16 Aug - 28 Aug	Delta
22 Aug - 04 Sep	Delta
31 Aug - 07 Sep	Air France
16 Aug - 23 Aug	Virgin Atlantic
06 Aug - 20 Aug	KLM
20 Aug - 02 Sep	British Airways
23 Aug - 03 Sep	British Airways
04 Aug - 13 Aug	British Airways
05 Aug - 12 Aug	British Airways
16 Aug - 31 Aug	British Airways
28 Aug - 03 Sep	British Airways
20 Aug - 16 Sep	Air France
04 Aug - 11 Aug	British Airways
29 Aug - 28 Sep	British Airways
29 Aug - 07 Sep	British Airways
06 Aug - 07 Aug	Hawaiian Airlines
07 Aug - 14 Aug	Air France

Also check the deals for one-way flights from San Jose to London in August.

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.

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Cheapest return flights from San Jose to London in August from 450€

Return flights