Cheapest return flights from Seattle to Istanbul in December from $1211

Best time to book flights for Seattle (SEA) to Istanbul (IST) flights at AirHint

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

Return flights

20 Dec - 27 Dec Icelandair
21 Dec - 28 Dec Icelandair
21 Dec - 04 Jan Lufthansa
20 Dec - 04 Jan Air Canada
21 Dec - 28 Dec Turkish Airlines direct
20 Dec - 27 Dec Turkish Airlines direct
21 Dec - 04 Jan Turkish Airlines direct
20 Dec - 04 Jan Turkish Airlines direct

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

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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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