AirHint found the following cheapest return flights from Portland (PDX) to Keflavik (KEF) in November 2025 (see full year).
Return flights
| 17 Nov - 24 Nov | Icelandair | direct | |
| 18 Nov - 23 Nov | Icelandair | direct | |
| 22 Nov - 27 Nov | Hawaiian Airlines | ||
| 20 Nov - 27 Nov | Icelandair | ||
| 20 Nov - 13 Dec | WestJet | ||
| 21 Nov - 13 Dec | Frontier Airlines |
Also check the deals for one-way flights from Portland to Keflavik in November.
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