AirHint found the following cheapest return flights from Portland (PDX) to Istanbul (SAW) in December 2025 (see full year).
Return flights
| 06 Dec - 15 Dec | Icelandair | ||
| 06 Dec - 13 Dec | Icelandair | ||
| 14 Dec - 04 Jan | Hawaiian Airlines | ||
| 19 Dec - 27 Dec | Icelandair | ||
| 26 Dec - 04 Jan | Qatar Airways |
Also check the deals for one-way flights from Portland to Istanbul in December.
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