Cheapest return flights from Portland to Istanbul in December from $378

AirHint found the following cheapest return flights from Portland (PDX) to Istanbul (IST) in December 2025 (see full year).

Return flights

06 Dec - 15 Dec Icelandair
01 Dec - 06 Dec Icelandair
06 Dec - 13 Dec Icelandair
28 Dec - 10 Jan Air France
04 Dec - 05 Jan Icelandair
25 Dec - 01 Jan Air Canada
16 Dec - 03 Jan Icelandair
14 Dec - 03 Jan Hawaiian Airlines
24 Dec - 01 Jan KLM
26 Dec - 02 Jan Alaska Airlines

Also check the deals for one-way flights from Portland to Istanbul in December.

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