AirHint found the following cheapest return flights from Kathmandu (KTM) to Istanbul (IST) in September 2026 (see full year).
Return flights
| 09 Sep - 15 Sep | Air Arabia | ||
| 10 Sep - 16 Sep | Air Arabia | ||
| 01 Sep - 20 Sep | Air Arabia | ||
| 01 Sep - 20 Sep | Turkish Airlines | direct | |
| 10 Sep - 16 Sep | Turkish Airlines | direct |
Also check the deals for one-way flights from Kathmandu to Istanbul in September.
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