AirHint found the following cheapest return flights from Portland (PDX) to Lisbon (LIS) in November 2025 (see full year).
Return flights
| 29 Nov - 14 Dec | Icelandair | ||
| 05 Nov - 03 Dec | United | ||
| 19 Nov - 03 Dec | Lufthansa | ||
| 10 Nov - 03 Dec | Delta | ||
| 27 Nov - 20 Dec | United | ||
| 10 Nov - 15 Nov | Icelandair | ||
| 29 Nov - 20 Dec | United | ||
| 08 Nov - 16 Nov | United |
Also check the deals for one-way flights from Portland to Lisbon in November.
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