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

Return flights

10 Dec - 12 Jan	Frontier Airlines
28 Dec - 19 Jan	KLM
03 Dec - 12 Jan	WestJet
29 Dec - 12 Jan	Air France
03 Dec - 09 Jan	WestJet
14 Dec - 12 Jan	British Airways
29 Dec - 09 Jan	Spirit Airlines
04 Dec - 11 Dec	WestJet
02 Dec - 09 Dec	Frontier Airlines
27 Dec - 10 Jan	Spirit Airlines
28 Dec - 11 Jan	Frontier Airlines
16 Dec - 22 Dec	British Airways
11 Dec - 18 Dec	KLM
10 Dec - 13 Dec	KLM
28 Dec - 09 Jan	Air France
07 Dec - 19 Dec	KLM
01 Dec - 10 Dec	Frontier Airlines
05 Dec - 12 Dec	Spirit Airlines
13 Dec - 16 Dec	Spirit Airlines
16 Dec - 30 Dec	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 623€

Return flights