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

Return flights

19 Jan - 25 Jan	KLM
23 Jan - 04 Feb	Delta
23 Jan - 01 Feb	Delta
28 Jan - 10 Feb	KLM
15 Jan - 20 Jan	KLM
23 Jan - 23 Feb	KLM
29 Jan - 10 Feb	KLM
20 Jan - 31 Jan	SWISS
13 Jan - 03 Feb	KLM
16 Jan - 19 Jan	KLM
30 Jan - 15 Feb	KLM
09 Jan - 20 Jan	KLM
30 Jan - 16 Feb	KLM
27 Jan - 05 Feb	SWISS
11 Jan - 18 Jan	KLM
15 Jan - 29 Jan	SWISS
22 Jan - 31 Jan	SWISS
01 Jan - 11 Jan	KLM
29 Jan - 14 Feb	SWISS
01 Jan - 31 Jan	SWISS

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 $1156

Return flights