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

Return flights

31 Dec - 14 Jan	KLM
08 Dec - 15 Dec	KLM
29 Dec - 12 Jan	KLM
16 Dec - 30 Dec	KLM
05 Dec - 24 Dec	KLM
16 Dec - 29 Dec	KLM
11 Dec - 18 Dec	KLM
16 Dec - 27 Dec	KLM
03 Dec - 16 Dec	WestJet
05 Dec - 08 Dec	British Airways
29 Dec - 09 Jan	Frontier Airlines
31 Dec - 08 Jan	Frontier Airlines
13 Dec - 22 Dec	Spirit Airlines
06 Dec - 10 Dec	KLM
31 Dec - 08 Jan	Turkish Airlines	direct
31 Dec - 14 Jan	Turkish Airlines	direct
29 Dec - 12 Jan	Turkish Airlines	direct
20 Dec - 05 Jan	Frontier Airlines
23 Dec - 01 Jan	Frontier Airlines
29 Dec - 09 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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from Houston to Istanbul in December from 620€

Return flights