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

Return flights

27 Aug - 10 Sep	Spirit Airlines
26 Aug - 10 Sep	Hawaiian Airlines
22 Aug - 29 Aug	Hawaiian Airlines
22 Aug - 04 Sep	Icelandair
14 Aug - 22 Aug	ITA Airways
03 Aug - 19 Aug	Spirit Airlines
10 Aug - 17 Aug	Alaska Airlines
11 Aug - 18 Aug	Spirit Airlines
09 Aug - 25 Aug	ITA Airways
07 Aug - 12 Aug	ITA Airways
05 Aug - 28 Aug	ITA Airways
19 Aug - 25 Aug	ITA Airways
05 Aug - 19 Aug	Icelandair
13 Aug - 12 Sep	Icelandair
31 Aug - 16 Sep	Icelandair
22 Aug - 09 Sep	Icelandair
22 Aug - 03 Sep	Icelandair
15 Aug - 17 Sep	Icelandair
15 Aug - 01 Sep	Icelandair
31 Aug - 13 Sep	Icelandair

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 $617

Return flights