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

Return flights

03 Dec - 10 Dec	Lufthansa
30 Dec - 20 Jan	SWISS
02 Dec - 11 Dec	Brussels Airlines
02 Dec - 09 Dec	Lufthansa
07 Dec - 17 Dec	Delta
04 Dec - 11 Dec	Lufthansa
07 Dec - 15 Dec	Lufthansa
04 Dec - 12 Dec	Lufthansa
27 Dec - 13 Jan	Iberia
14 Dec - 25 Dec	Iberia
06 Dec - 12 Dec	Lufthansa
05 Dec - 08 Dec	Delta
31 Dec - 11 Jan	Brussels Airlines
24 Dec - 13 Jan	Iberia
29 Dec - 15 Jan	Delta
29 Dec - 08 Jan	SWISS
26 Dec - 11 Jan	British Airways
29 Dec - 10 Jan	SWISS
27 Dec - 06 Jan	Aer Lingus
26 Dec - 10 Jan	Lufthansa

Also check the deals for one-way flights from Los Angeles to Lisbon 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 Lisbon in December from 375€

Return flights