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

Return flights

09 Sep - 15 Sep	Thai AirAsia
12 Sep - 15 Sep	Thai AirAsia
01 Sep - 10 Sep	Thai AirAsia
10 Sep - 17 Sep	Thai Lion Air
07 Sep - 11 Sep	Thai AirAsia
04 Sep - 17 Sep	Thai Lion Air
02 Sep - 11 Sep	Thai AirAsia
18 Sep - 23 Sep	Thai AirAsia
15 Sep - 25 Sep	Thai AirAsia
05 Sep - 07 Sep	Thai AirAsia
22 Sep - 02 Oct	Thai AirAsia
12 Sep - 02 Oct	Thai Lion Air
27 Sep - 04 Oct	Thai Lion Air
27 Sep - 05 Oct	Thai AirAsia
27 Sep - 18 Oct	Thai AirAsia
04 Sep - 12 Oct	Thai Lion Air
07 Sep - 05 Oct	Thai AirAsia
24 Sep - 24 Oct	Thai AirAsia
25 Sep - 12 Oct	Thai AirAsia
13 Sep - 31 Oct	Thai Lion Air

Also check the deals for one-way flights from Taipei 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 Taipei to Kathmandu in September from $382

Return flights