AirHint found the following cheapest return flights from London (LCY) to San Jose (SJO) in January 2026 (see full year).

Return flights

20 Jan - 27 Jan	SWISS
13 Jan - 28 Jan	SWISS
23 Jan - 04 Feb	SWISS
20 Jan - 29 Jan	SWISS
14 Jan - 30 Jan	SWISS
12 Jan - 26 Jan	Air Dolomiti
23 Jan - 26 Jan	Air Dolomiti
23 Jan - 31 Jan	SWISS
22 Jan - 04 Feb	Air Dolomiti
19 Jan - 04 Feb	Air Dolomiti
29 Jan - 04 Feb	Air Dolomiti
13 Jan - 27 Jan	SWISS
22 Jan - 29 Jan	Air Dolomiti
21 Jan - 27 Jan	Air Dolomiti
19 Jan - 03 Feb	Air Dolomiti
22 Jan - 03 Feb	Air Dolomiti
22 Jan - 02 Feb	SWISS
30 Jan - 11 Feb	Air Canada
30 Jan - 04 Feb	Air Canada
19 Jan - 19 Feb	Air Canada

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

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 January from 659€

Return flights