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

Return flights

17 Nov - 26 Nov	Icelandair
17 Nov - 03 Dec	Icelandair
17 Nov - 23 Nov	Icelandair
13 Nov - 20 Nov	Icelandair
29 Nov - 09 Dec	Delta
29 Nov - 13 Dec	Delta
12 Nov - 19 Nov	KLM
09 Nov - 12 Nov	KLM
10 Nov - 06 Dec	KLM
11 Nov - 06 Dec	KLM
12 Nov - 06 Dec	KLM
14 Nov - 17 Nov	KLM
21 Nov - 28 Nov	WestJet
14 Nov - 21 Nov	KLM
13 Nov - 16 Nov	KLM
14 Nov - 06 Dec	KLM
15 Nov - 22 Nov	KLM
15 Nov - 06 Dec	Air France
29 Nov - 20 Dec	WestJet
19 Nov - 13 Dec	Icelandair

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

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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Cheapest return flights from Seattle to Istanbul in November from 460€

Return flights