Cheapest one-way flights from Seattle to Istanbul in December from $330

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

One-Way flights

01 Dec Alaska Airlines
24 Dec Alaska Airlines
22 Dec Alaska Airlines
19 Dec KLM
24 Dec Turkish Airlines direct
01 Dec Turkish Airlines direct
22 Dec Turkish Airlines direct
19 Dec Turkish Airlines direct
18 Dec Air France
18 Dec Turkish Airlines direct

Also check the deals for return flights from Seattle to Istanbul in December.

Skyscanner

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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