Cheapest return flights from Seattle to Istanbul in December from 886€

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

Return flights

30 Dec - 09 Jan Icelandair
31 Dec - 07 Jan Icelandair
28 Dec - 08 Jan Lufthansa
30 Dec - 06 Jan Icelandair
29 Dec - 06 Jan KLM
31 Dec - 07 Jan Turkish Airlines direct
30 Dec - 09 Jan Turkish Airlines direct
28 Dec - 08 Jan Turkish Airlines direct
28 Dec - 02 Jan Lufthansa
30 Dec - 06 Jan Turkish Airlines direct

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

Powered by

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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Feel free to contact us with any feedback or request another flight research.