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

Return flights

08 Dec - 13 Dec	Spirit Airlines
01 Dec - 06 Dec	Viva
06 Dec - 13 Dec	Spirit Airlines
05 Dec - 13 Dec	Spirit Airlines
03 Dec - 09 Dec	Frontier Airlines
08 Dec - 20 Dec	Spirit Airlines
01 Dec - 12 Dec	Viva
12 Dec - 20 Dec	Viva
01 Dec - 04 Dec	Viva
01 Dec - 05 Dec	Viva
29 Dec - 10 Jan	Viva
29 Dec - 16 Jan	Viva
26 Dec - 10 Jan	Viva
29 Dec - 17 Jan	Viva
31 Dec - 07 Jan	Alaska Airlines
28 Dec - 10 Jan	Spirit Airlines
26 Dec - 16 Jan	Viva
29 Dec - 19 Jan	Viva
22 Dec - 12 Jan	Alaska Airlines
31 Dec - 08 Jan	United

Also check the deals for one-way flights from Los Angeles 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 Los Angeles to San Jose in December from 239€

Return flights