Cheapest return flights from Seattle to Istanbul in December from 619€

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

Return flights

03 Dec - 17 Dec British Airways
30 Dec - 13 Jan Air France
19 Dec - 26 Dec KLM
03 Dec - 17 Dec Turkish Airlines direct
30 Dec - 13 Jan Turkish Airlines direct
19 Dec - 26 Dec 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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