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	Lufthansa
26 Jan - 09 Feb	SWISS
22 Jan - 11 Feb	SWISS
29 Jan - 04 Feb	Lufthansa
27 Jan - 10 Feb	SWISS
19 Jan - 16 Feb	Delta
19 Jan - 04 Feb	Delta
21 Jan - 04 Feb	Delta
28 Jan - 11 Feb	KLM
27 Jan - 12 Feb	SWISS
16 Jan - 19 Jan	SWISS
16 Jan - 26 Jan	SWISS
16 Jan - 03 Feb	SWISS
16 Jan - 25 Jan	Delta
16 Jan - 27 Jan	Delta
16 Jan - 29 Jan	Delta
17 Jan - 29 Jan	Delta
23 Jan - 26 Jan	British Airways
26 Jan - 26 Jan	KLM
28 Jan - 28 Jan	KLM

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.

Book a cheap hotel in San Jose

Cheap car rent in San Jose

Cheapest return flights from London to San Jose in January from $834

Return flights