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

Return flights

04 Dec - 07 Dec	KLM
06 Dec - 10 Dec	Air France
04 Dec - 10 Dec	Turkish Airlines	direct
05 Dec - 24 Dec	KLM
07 Dec - 14 Dec	KLM
29 Dec - 07 Jan	KLM
16 Dec - 29 Dec	KLM
15 Dec - 31 Dec	Spirit Airlines
30 Dec - 06 Jan	Frontier Airlines
04 Dec - 07 Dec	Turkish Airlines	direct
12 Dec - 26 Dec	Spirit Airlines
29 Dec - 06 Jan	Spirit Airlines
07 Dec - 14 Dec	Turkish Airlines	direct
15 Dec - 05 Jan	Spirit Airlines
20 Dec - 20 Jan	Spirit Airlines
23 Dec - 05 Jan	Frontier Airlines
22 Dec - 05 Jan	Spirit Airlines
23 Dec - 04 Jan	Frontier Airlines
30 Dec - 02 Jan	Spirit Airlines
26 Dec - 03 Jan	Spirit Airlines

Also check the deals for one-way flights from Houston 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 Houston to Istanbul in December from $719

Return flights