AirHint found the following cheapest return flights from Porto (OPO) to Buenos Aires (AEP) in September 2026 (see full year).
Return flights
| 15 Sep - 29 Sep | LATAM Airlines Group | ||
| 09 Sep - 24 Sep | TAP | ||
| 13 Sep - 04 Oct | TAP | ||
| 30 Sep - 16 Oct | Vueling Airlines |
Also check the deals for one-way flights from Porto to Buenos Aires in September.
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