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

Return flights

02 Dec - 16 Jan	United
02 Dec - 22 Dec	SWISS
13 Dec - 10 Jan	United
11 Dec - 22 Dec	Air France
11 Dec - 23 Dec	Air France
30 Dec - 10 Jan	United
02 Dec - 02 Jan	Air Canada
24 Dec - 03 Jan	British Airways
26 Dec - 02 Jan	British Airways
20 Dec - 11 Jan	Iberia

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 660€

Return flights