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

Return flights

10 Dec - 14 Dec	LATAM Airlines Group
28 Dec - 12 Jan	Avianca
12 Dec - 27 Dec	Delta
12 Dec - 15 Jan	Air Canada
22 Dec - 13 Jan	Frontier Airlines
13 Dec - 10 Jan	Frontier Airlines
29 Dec - 01 Jan	Avianca
20 Dec - 15 Jan	Frontier Airlines
18 Dec - 21 Dec	Frontier Airlines
18 Dec - 22 Dec	Frontier Airlines
23 Dec - 06 Jan	Avianca
22 Dec - 06 Jan	Delta
20 Dec - 05 Jan	Delta
20 Dec - 03 Jan	Air Canada

Also check the deals for one-way flights from Washington 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 Washington to Lima in December from 458€

Return flights