Cheapest return flights from Chicago to Istanbul in December from 570€

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

Return flights

31 Dec - 14 Jan Icelandair
03 Dec - 08 Dec Icelandair
08 Dec - 15 Dec Lufthansa
02 Dec - 17 Dec Spirit Airlines
02 Dec - 09 Dec Icelandair
09 Dec - 22 Dec British Airways
10 Dec - 24 Dec British Airways
01 Dec - 10 Dec Spirit Airlines
03 Dec - 07 Dec Spirit Airlines
15 Dec - 23 Jan Frontier Airlines
05 Dec - 09 Dec Aer Lingus
09 Dec - 19 Dec Icelandair
27 Dec - 16 Jan Air Serbia
15 Dec - 24 Jan Frontier Airlines
29 Dec - 12 Jan British Airways
15 Dec - 17 Jan Frontier Airlines
24 Dec - 21 Jan LOT
15 Dec - 27 Jan Air France
30 Dec - 07 Jan United
10 Dec - 07 Jan Aer Lingus

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

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