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

Return flights

01 Dec - 10 Dec	Air France
28 Dec - 11 Jan	KLM
31 Dec - 14 Jan	Air France
01 Dec - 15 Dec	Air France
01 Dec - 10 Dec	Turkish Airlines	direct
01 Dec - 15 Dec	Turkish Airlines	direct
07 Dec - 14 Dec	Delta
31 Dec - 14 Jan	Turkish Airlines	direct
26 Dec - 02 Jan	Lufthansa
19 Dec - 12 Jan	Lufthansa
28 Dec - 11 Jan	Turkish Airlines	direct
20 Dec - 27 Dec	Air France
18 Dec - 04 Jan	KLM
26 Dec - 02 Jan	Turkish Airlines	direct
20 Dec - 27 Dec	Turkish Airlines	direct
19 Dec - 12 Jan	Turkish Airlines	direct
18 Dec - 04 Jan	Turkish Airlines	direct

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 635€

Return flights