AirHint found the following cheapest return flights from Seattle (SEA) to Lima (LIM) in December 2025 (see full year).

Return flights

11 Dec - 23 Dec	Frontier Airlines
02 Dec - 16 Dec	Alaska Airlines
02 Dec - 23 Dec	Hawaiian Airlines
22 Dec - 12 Jan	Frontier Airlines
10 Dec - 24 Dec	LATAM Airlines Group
09 Dec - 24 Dec	Alaska Airlines
20 Dec - 12 Jan	Alaska Airlines
19 Dec - 12 Jan	Frontier Airlines
10 Dec - 07 Jan	Hawaiian Airlines
17 Dec - 21 Dec	Hawaiian Airlines
09 Dec - 10 Jan	Hawaiian Airlines
15 Dec - 05 Jan	Frontier Airlines
02 Dec - 04 Jan	Hawaiian Airlines
20 Dec - 04 Jan	Alaska Airlines
18 Dec - 03 Jan	Hawaiian Airlines
17 Dec - 06 Jan	United

Also check the deals for one-way flights from Seattle to Lima 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 Seattle to Lima in December from $721

Return flights