AirHint found the following cheapest return flights from Washington (IAD) to Lima (LIM) in October 2025 (see full year).
Return flights
| 30 Oct - 06 Nov | Avianca | ||
| 29 Oct - 05 Nov | Copa | ||
| 31 Oct - 07 Nov | United | ||
| 31 Oct - 04 Nov | United |
Also check the deals for one-way flights from Washington to Lima in October.
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