Cheapest return flights from Seattle to Istanbul in May from $675

AirHint found the following cheapest return flights from Seattle (SEA) to Istanbul (IST) in May 2026 (see full year).

Return flights

01 May - 15 May Icelandair
19 May - 13 Jun Scandinavian Airlines
15 May - 30 May Scandinavian Airlines
25 May - 05 Jun KLM
29 May - 07 Jun Scandinavian Airlines
01 May - 15 May Turkish Airlines direct
15 May - 30 May Turkish Airlines direct
19 May - 13 Jun Turkish Airlines direct
25 May - 05 Jun Turkish Airlines direct
29 May - 07 Jun Turkish Airlines direct

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

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