AirHint found the following cheapest return flights from Portland (PDX) to Istanbul (IST) in March 2026 (see full year).
Return flights
| 04 Mar - 13 Mar | Hawaiian Airlines | ||
| 23 Mar - 18 Apr | KLM | ||
| 20 Mar - 27 Mar | Alaska Airlines |
Also check the deals for one-way flights from Portland to Istanbul in March.
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