Cheapest return flights from Seattle to Istanbul in September from $637

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

Return flights

23 Sep - 07 Oct Icelandair
23 Sep - 30 Sep Aer Lingus
30 Sep - 09 Oct Icelandair
22 Sep - 25 Sep Lufthansa
15 Sep - 24 Sep Icelandair
28 Sep - 02 Oct Icelandair
30 Sep - 13 Oct Hawaiian Airlines
29 Sep - 08 Oct Alaska Airlines
23 Sep - 28 Sep Hawaiian Airlines
29 Sep - 03 Oct KLM
30 Sep - 14 Oct KLM
22 Sep - 24 Sep Hawaiian Airlines
25 Sep - 18 Oct KLM
14 Sep - 20 Oct Alaska Airlines
16 Sep - 13 Oct Qatar Airways
10 Sep - 18 Sep Qatar Airways
25 Sep - 29 Sep Frontier Airlines
14 Sep - 21 Sep Qatar Airways
13 Sep - 27 Sep WestJet
24 Sep - 29 Sep Qatar Airways

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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