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

Return flights

27 Dec - 13 Jan	Iberia
30 Dec - 24 Jan	SWISS
12 Dec - 19 Jan	British Airways
27 Dec - 17 Jan	British Airways
01 Dec - 27 Dec	Iberia
02 Dec - 27 Dec	Iberia
04 Dec - 27 Dec	British Airways
23 Dec - 17 Jan	British Airways
25 Dec - 08 Jan	British Airways
26 Dec - 06 Jan	British Airways
16 Dec - 10 Jan	British Airways
24 Dec - 17 Jan	SWISS
30 Dec - 24 Jan	TAP	direct
12 Dec - 17 Dec	Delta
17 Dec - 28 Dec	British Airways
23 Dec - 31 Dec	Frontier Airlines
02 Dec - 27 Dec	TAP	direct
18 Dec - 29 Dec	British Airways
04 Dec - 27 Dec	TAP	direct
27 Dec - 31 Dec	Frontier Airlines

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 442€

Return flights