Cheapest return flights from Seattle to Istanbul in May from $636

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

Return flights

02 May - 09 May KLM
08 May - 19 May Icelandair
01 May - 09 May Air France
01 May - 10 May Air France
07 May - 19 May Icelandair
24 May - 30 May Icelandair
09 May - 17 May Icelandair
10 May - 17 May Icelandair
16 May - 23 May Icelandair
24 May - 08 Jun Icelandair
15 May - 22 May Alaska Airlines
29 May - 12 Jun KLM
24 May - 08 Jun Turkish Airlines direct
29 May - 12 Jun Turkish Airlines direct

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

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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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