AirHint found the following cheapest return flights from Minneapolis (MSP) to Porto (OPO) in September 2026 (see full year).
Return flights
| 08 Sep - 15 Sep | Iberia | ||
| 25 Sep - 02 Oct | Lufthansa | ||
| 24 Sep - 01 Oct | British Airways | ||
| 07 Sep - 14 Sep | Iberia |
Also check the deals for one-way flights from Minneapolis to Porto in September.
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