Cheapest return flights from Portland to Istanbul in October from $923

Best time to book flights for Portland (PDX) to Istanbul (IST) flights at AirHint

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

Return flights

09 Oct - 14 Oct Icelandair
30 Oct - 04 Nov Icelandair
15 Oct - 20 Oct Icelandair
10 Oct - 14 Oct Sun Country Airlines

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

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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