Cheapest return IAH–IST flights, September

AirHint found the following cheapest return flights from Houston (IAH) to Istanbul (IST) in September 2026 (see full year).

Return flights

06 Sep - 22 Sep Delta
06 Sep - 30 Sep Delta
30 Sep - 14 Oct Spirit Airlines
15 Sep - 07 Oct Lufthansa
30 Sep - 14 Oct Turkish Airlines direct
15 Sep - 07 Oct Turkish Airlines direct
04 Sep - 11 Sep Turkish Airlines direct
27 Sep - 11 Oct Turkish Airlines direct

Also check the deals for one-way flights from Houston to Istanbul in September.

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