Cheapest return flights from Portland to Istanbul in December from $819

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

Return flights

11 Dec - 12 Jan British Airways
11 Dec - 18 Jan British Airways
14 Dec - 15 Jan KLM
13 Dec - 31 Dec Alaska Airlines
18 Dec - 19 Jan Lufthansa
24 Dec - 01 Jan KLM
26 Dec - 04 Jan British Airways
14 Dec - 04 Jan British Airways

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

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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