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

Return flights

21 Sep - 26 Sep	Thai AirAsia
21 Sep - 24 Sep	Thai AirAsia
21 Sep - 29 Sep	Thai AirAsia
18 Sep - 26 Sep	Thai AirAsia
18 Sep - 24 Sep	Thai AirAsia
18 Sep - 29 Sep	Thai AirAsia
21 Sep - 06 Oct	Thai AirAsia
18 Sep - 19 Sep	Thai AirAsia
18 Sep - 06 Oct	Thai AirAsia
10 Sep - 26 Sep	Thai AirAsia
12 Sep - 26 Sep	Thai AirAsia
12 Sep - 24 Sep	Thai AirAsia
19 Sep - 06 Oct	Thai AirAsia
21 Sep - 03 Oct	Thai AirAsia
21 Sep - 07 Oct	Thai AirAsia
18 Sep - 03 Oct	Thai AirAsia
18 Sep - 07 Oct	Thai AirAsia
25 Sep - 06 Oct	Thai AirAsia
21 Sep - 04 Oct	Thai AirAsia
18 Sep - 04 Oct	Thai AirAsia

Also check the deals for one-way flights from Phuket 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.

Book a cheap hotel in Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from Phuket to Kathmandu in September from $353

Return flights