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

Return flights

28 Oct - 04 Nov	jetBlue
28 Oct - 08 Nov	Air France
28 Oct - 13 Nov	Air France
22 Oct - 03 Nov	jetBlue
15 Oct - 05 Nov	jetBlue
01 Oct - 15 Oct	jetBlue
08 Oct - 22 Oct	jetBlue
08 Oct - 12 Oct	jetBlue
27 Oct - 17 Nov	Air France
06 Oct - 12 Oct	jetBlue
14 Oct - 23 Oct	SWISS
14 Oct - 31 Oct	SWISS
07 Oct - 19 Oct	jetBlue
14 Oct - 28 Oct	SWISS
01 Oct - 17 Oct	jetBlue
06 Oct - 19 Oct	jetBlue
30 Oct - 14 Nov	Air France
30 Oct - 08 Nov	Air France
30 Oct - 15 Nov	Lufthansa
01 Oct - 01 Nov	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 541€

Return flights