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

Return flights

15 Jan - 26 Jan	Icelandair
19 Jan - 27 Jan	Icelandair
22 Jan - 29 Jan	Icelandair
15 Jan - 22 Jan	Lufthansa
16 Jan - 28 Jan	Icelandair
24 Jan - 31 Jan	Air Canada
27 Jan - 07 Feb	Air Canada
25 Jan - 07 Feb	Air Canada
27 Jan - 10 Feb	Air Canada
26 Jan - 23 Feb	Air Canada
22 Jan - 02 Feb	Air Canada
27 Jan - 02 Feb	Air Canada
23 Jan - 04 Feb	Air Canada
22 Jan - 09 Feb	Air Canada
30 Jan - 04 Feb	Air Canada
24 Jan - 09 Feb	Air Canada
16 Jan - 31 Jan	Air Canada
22 Jan - 25 Jan	Air Canada
20 Jan - 27 Jan	Air Canada
16 Jan - 23 Jan	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 $645

Return flights