AirHint found the following cheapest return flights from Washington (IAD) to Buenos Aires (EZE) in October 2025 (see full year).
Return flights
| 29 Oct - 03 Nov | Avianca | ||
| 29 Oct - 24 Nov | Avianca | ||
| 24 Oct - 26 Oct | Avianca | ||
| 30 Oct - 09 Nov | Copa | ||
| 22 Oct - 03 Nov | Copa | ||
| 22 Oct - 24 Nov | Copa | ||
| 25 Oct - 02 Nov | Delta | ||
| 23 Oct - 27 Oct | Copa |
Also check the deals for one-way flights from Washington to Buenos Aires in October.
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