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
30 Oct - 06 Nov	SWISS
28 Oct - 11 Nov	Lufthansa
30 Oct - 10 Nov	SWISS
30 Oct - 13 Nov	SWISS
28 Oct - 04 Nov	Lufthansa
30 Oct - 15 Nov	SWISS
29 Oct - 12 Nov	Lufthansa
29 Oct - 06 Nov	Lufthansa
28 Oct - 08 Nov	Lufthansa
25 Oct - 27 Oct	SWISS
24 Oct - 30 Oct	Lufthansa
24 Oct - 28 Oct	Lufthansa
28 Oct - 30 Oct	SWISS
27 Oct - 30 Oct	SWISS
26 Oct - 28 Oct	SWISS
25 Oct - 26 Oct	SWISS
24 Oct - 26 Oct	Lufthansa

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 706€

Return flights