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

Return flights

01 Dec - 10 Dec	Air Canada
01 Dec - 15 Dec	Air Canada
01 Dec - 23 Jan	Air Canada
06 Dec - 14 Dec	Air Canada
08 Dec - 21 Dec	Air Canada
01 Dec - 11 Dec	United
01 Dec - 14 Jan	United
08 Dec - 17 Dec	Air France
01 Dec - 13 Dec	Iberia
25 Dec - 06 Jan	United
26 Dec - 05 Jan	Air Canada

Also check the deals for one-way flights from Lisbon 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 Lisbon to San Jose in December from $731

Return flights