Cheapest return flights from Seattle to Istanbul in May from $618

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

Return flights

01 May - 11 May British Airways
26 May - 02 Jun Scandinavian Airlines
05 May - 18 May Scandinavian Airlines
11 May - 25 May Air France
09 May - 17 May KLM
08 May - 18 May Lufthansa
09 May - 30 May KLM
17 May - 28 May Air France
14 May - 28 May Icelandair
14 May - 28 May Turkish Airlines direct
17 May - 28 May Turkish Airlines direct
26 May - 02 Jun Turkish Airlines direct

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

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