AirHint found the following cheapest return flights from London (STN) to San Jose (SJO) in December 2025 (see full year).

Return flights

01 Dec - 15 Dec	Ryanair
29 Dec - 18 Jan	Ryanair
06 Dec - 09 Dec	Ryanair
10 Dec - 29 Dec	Ryanair
06 Dec - 13 Dec	Ryanair
28 Dec - 18 Jan	Ryanair
27 Dec - 10 Jan	Ryanair
08 Dec - 12 Jan	Ryanair
10 Dec - 22 Dec	Ryanair
29 Dec - 17 Jan	Ryanair
12 Dec - 21 Dec	Ryanair
27 Dec - 17 Jan	Ryanair
05 Dec - 11 Dec	Ryanair
02 Dec - 11 Dec	Ryanair
09 Dec - 20 Dec	Ryanair
11 Dec - 07 Jan	Ryanair
16 Dec - 27 Dec	Ryanair
29 Dec - 07 Jan	Ryanair
16 Dec - 13 Jan	Ryanair
26 Dec - 07 Jan	Ryanair

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

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 December from 916€

Return flights