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

Return flights

15 Oct - 26 Oct	Avianca
22 Oct - 28 Oct	Avianca
20 Oct - 27 Oct	Avianca
22 Oct - 25 Oct	Avianca
29 Oct - 05 Nov	Avianca
13 Oct - 20 Oct	Avianca
16 Oct - 18 Oct	Avianca
27 Oct - 30 Oct	Avianca
15 Oct - 21 Oct	Avianca
02 Oct - 05 Oct	Avianca
13 Oct - 10 Nov	Avianca
24 Oct - 06 Nov	Avianca
23 Oct - 02 Nov	Avianca
23 Oct - 09 Nov	Avianca
01 Oct - 01 Nov	Avianca
02 Oct - 01 Nov	Avianca
17 Oct - 19 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 $379

Return flights