Cheapest return flights from Seattle to Istanbul in September from $621

AirHint found the following cheapest return flights from Seattle (SEA) to Istanbul (SAW) in September 2025 (see full year).

Return flights

04 Sep - 11 Sep Icelandair
04 Sep - 21 Sep Icelandair
15 Sep - 24 Sep SWISS
15 Sep - 01 Oct Icelandair
28 Sep - 12 Oct Icelandair
11 Sep - 28 Sep Air Canada
29 Sep - 11 Oct Icelandair
26 Sep - 06 Oct Icelandair
08 Sep - 22 Sep Icelandair
06 Sep - 26 Sep Icelandair
16 Sep - 13 Oct Qatar Airways
05 Sep - 19 Sep Icelandair
19 Sep - 17 Oct Qatar Airways
03 Sep - 10 Sep Qatar Airways
06 Sep - 07 Sep Icelandair

Also check the deals for one-way flights from Seattle to Istanbul in September.

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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