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

Return flights

01 Sep - 13 Sep	Thai AirAsia
07 Sep - 10 Sep	Thai VietJet Air
04 Sep - 08 Sep	Thai AirAsia
18 Sep - 27 Sep	Thai Lion Air
03 Sep - 02 Oct	Thai Lion Air
26 Sep - 02 Oct	Thai VietJet Air
27 Sep - 29 Sep	Thai VietJet Air
26 Sep - 29 Sep	Thai VietJet Air
04 Sep - 17 Sep	AirAsia X
06 Sep - 15 Sep	AirAsia X
01 Sep - 14 Sep	AirAsia X
08 Sep - 26 Sep	AirAsia X
27 Sep - 03 Oct	Thai Lion Air
07 Sep - 05 Oct	AirAsia X
27 Sep - 09 Oct	AirAsia X
27 Sep - 11 Oct	AirAsia X
19 Sep - 03 Oct	AirAsia X
26 Sep - 11 Oct	AirAsia X
12 Sep - 13 Oct	Thai Airways
15 Sep - 06 Oct	Thai Airways

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 327€

Return flights