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 - 11 Nov	jetBlue
15 Oct - 25 Oct	Scandinavian Airlines
22 Oct - 05 Nov	jetBlue
28 Oct - 06 Nov	jetBlue
08 Oct - 22 Oct	Scandinavian Airlines
27 Oct - 10 Nov	jetBlue
02 Oct - 05 Oct	jetBlue
11 Oct - 25 Oct	Aer Lingus
02 Oct - 18 Oct	Air France
09 Oct - 13 Oct	jetBlue
24 Oct - 07 Nov	Scandinavian Airlines
19 Oct - 02 Nov	Aer Lingus
31 Oct - 14 Nov	Air France
31 Oct - 10 Nov	Air France
17 Oct - 25 Oct	Scandinavian Airlines
30 Oct - 04 Nov	jetBlue
08 Oct - 13 Oct	jetBlue
01 Oct - 15 Oct	Air France
01 Oct - 11 Oct	Air France

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 542€

Return flights