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

Return flights

07 Dec - 14 Dec	Ryanair
06 Dec - 16 Dec	Ryanair
01 Dec - 24 Dec	easyJet
07 Dec - 16 Dec	Ryanair
09 Dec - 20 Jan	Ryanair
08 Dec - 15 Dec	Ryanair
09 Dec - 18 Dec	Ryanair
09 Dec - 17 Dec	Ryanair
09 Dec - 09 Dec	Ryanair
13 Dec - 20 Dec	Ryanair
09 Dec - 16 Dec	Ryanair
27 Dec - 20 Jan	Ryanair
27 Dec - 24 Jan	Ryanair
27 Dec - 17 Jan	Ryanair
23 Dec - 01 Jan	Ryanair
09 Dec - 06 Jan	Ryanair
09 Dec - 10 Jan	Ryanair
30 Dec - 06 Jan	Ryanair
20 Dec - 03 Jan	Ryanair
13 Dec - 03 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 $1008

Return flights