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

Return flights

30 Oct - 31 Oct	Copa
29 Oct - 05 Nov	Copa
22 Oct - 03 Nov	Avianca
14 Oct - 02 Nov	Avianca
02 Oct - 08 Oct	Avianca
20 Oct - 27 Oct	Avianca
24 Oct - 01 Nov	Avianca
07 Oct - 09 Oct	Avianca
22 Oct - 28 Oct	Avianca
13 Oct - 20 Oct	Avianca
04 Oct - 11 Oct	Avianca
15 Oct - 20 Oct	Avianca
17 Oct - 01 Nov	Copa
18 Oct - 21 Oct	Delta
12 Oct - 20 Oct	Delta

Also check the deals for one-way flights from Washington to Lima in October.

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 October from 324€

Return flights