AirHint found the following cheapest return flights from London (LCY) to San Jose (SJO) in October 2025 (see full year).

Return flights

14 Oct - 29 Oct	SWISS
14 Oct - 27 Oct	SWISS
14 Oct - 28 Oct	SWISS
28 Oct - 04 Nov	SWISS
21 Oct - 28 Oct	SWISS
15 Oct - 30 Oct	SWISS
14 Oct - 30 Oct	SWISS
30 Oct - 04 Nov	SWISS
30 Oct - 06 Nov	SWISS
15 Oct - 29 Oct	SWISS
16 Oct - 23 Oct	KLM
31 Oct - 12 Nov	KLM
02 Oct - 21 Oct	SWISS
26 Oct - 02 Nov	KLM
02 Oct - 16 Oct	SWISS
28 Oct - 14 Nov	SWISS
31 Oct - 07 Nov	SWISS
13 Oct - 09 Nov	KLM
20 Oct - 03 Nov	KLM
24 Oct - 06 Nov	SWISS

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

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 London to San Jose in October from 649€

Return flights