AirHint found the following cheapest return flights from Chicago (ORD) to Istanbul (SAW) in December 2025 (see full year).

Return flights

10 Dec - 09 Jan	KLM
17 Dec - 23 Dec	Air Serbia
17 Dec - 10 Jan	Spirit Airlines
24 Dec - 17 Jan	Scandinavian Airlines
15 Dec - 15 Jan	Scandinavian Airlines
30 Dec - 13 Jan	KLM
14 Dec - 24 Dec	Lufthansa
24 Dec - 12 Jan	Icelandair
24 Dec - 23 Jan	Icelandair
23 Dec - 31 Dec	Icelandair
22 Dec - 17 Jan	Icelandair
24 Dec - 31 Dec	Icelandair
24 Dec - 08 Jan	Icelandair
21 Dec - 23 Jan	Aer Lingus
17 Dec - 27 Dec	KLM
21 Dec - 30 Dec	Aer Lingus
12 Dec - 26 Dec	KLM
15 Dec - 29 Dec	KLM
12 Dec - 21 Dec	Qatar Airways
13 Dec - 21 Dec	Qatar Airways

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

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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Cheapest return flights from Chicago to Istanbul in December from 656€

Return flights