Cheapest return flights from Seattle to Istanbul in December from 483€

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

Return flights

29 Dec - 24 Jan Lufthansa
26 Dec - 17 Jan British Airways
04 Dec - 18 Dec British Airways
28 Dec - 17 Jan British Airways
27 Dec - 17 Jan British Airways
07 Dec - 21 Dec British Airways
25 Dec - 17 Jan British Airways
04 Dec - 18 Dec Turkish Airlines direct
13 Dec - 23 Dec British Airways
15 Dec - 15 Jan British Airways
15 Dec - 10 Jan Air France
29 Dec - 24 Jan Turkish Airlines direct
08 Dec - 27 Dec KLM
07 Dec - 21 Dec Turkish Airlines direct
25 Dec - 17 Jan Turkish Airlines direct
16 Dec - 10 Jan Air France
15 Dec - 29 Dec Hawaiian Airlines
14 Dec - 29 Dec Hawaiian Airlines
08 Dec - 27 Dec Turkish Airlines direct
14 Dec - 31 Dec Hawaiian Airlines

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

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