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

Return flights

30 Oct - 11 Nov	SWISS
29 Oct - 05 Nov	SWISS
31 Oct - 09 Nov	SWISS
15 Oct - 22 Oct	Lufthansa
28 Oct - 04 Nov	SWISS
31 Oct - 13 Nov	Lufthansa
27 Oct - 09 Nov	SWISS
07 Oct - 14 Oct	SWISS
28 Oct - 11 Nov	SWISS
23 Oct - 04 Nov	SWISS
23 Oct - 09 Nov	SWISS
15 Oct - 26 Oct	SWISS
22 Oct - 03 Nov	SWISS
24 Oct - 27 Oct	SWISS
10 Oct - 20 Oct	Lufthansa
09 Oct - 22 Oct	SWISS
17 Oct - 29 Oct	SWISS
15 Oct - 28 Oct	KLM
10 Oct - 23 Oct	KLM
19 Oct - 29 Oct	KLM

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 619€

Return flights