AirHint found the following cheapest return flights from Istanbul (SAW) to Kathmandu (KTM) in September 2025 (see full year).

Return flights

11 Sep - 18 Sep	Air Arabia
04 Sep - 09 Sep	Air Arabia
12 Sep - 05 Oct	Pegasus Airlines
06 Sep - 20 Sep	Air Arabia
07 Sep - 21 Sep	Air Arabia
22 Sep - 27 Sep	Air Arabia
13 Sep - 06 Oct	Pegasus Airlines
22 Sep - 20 Oct	Air Arabia
22 Sep - 21 Oct	Air Arabia
23 Sep - 20 Oct	Air Arabia
23 Sep - 21 Oct	Air Arabia
24 Sep - 21 Oct	Air Arabia
26 Sep - 12 Oct	Air Arabia
27 Sep - 13 Oct	Air Arabia
23 Sep - 22 Oct	Air Arabia

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

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 Istanbul to Kathmandu in September from 413€

Return flights