Cheapest return flights from Chicago to Istanbul in December from 635€

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 Air France
28 Dec - 11 Jan Air France
24 Dec - 31 Dec Air France
01 Dec - 15 Dec Air France
14 Dec - 28 Dec Air France
01 Dec - 15 Dec Turkish Airlines direct
21 Dec - 31 Dec Air France
31 Dec - 14 Jan Turkish Airlines direct
23 Dec - 31 Dec Air France
23 Dec - 30 Dec KLM
28 Dec - 11 Jan Turkish Airlines direct
26 Dec - 03 Jan Air France
22 Dec - 04 Jan Air France
24 Dec - 31 Dec Turkish Airlines direct
26 Dec - 03 Jan Turkish Airlines direct
23 Dec - 30 Dec Turkish Airlines direct
14 Dec - 28 Dec Turkish Airlines direct
22 Dec - 04 Jan Turkish Airlines direct

Also check the deals for one-way flights from Chicago 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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