Cheapest return flights from Bangkok to Kathmandu in September from $225

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

Return flights

04 Sep - 30 Sep Thai AirAsia direct
04 Sep - 11 Sep Thai AirAsia direct
03 Sep - 11 Sep Thai AirAsia direct
03 Sep - 08 Sep Thai AirAsia direct
03 Sep - 13 Sep Thai AirAsia direct
04 Sep - 08 Sep Thai AirAsia direct
04 Sep - 13 Sep Thai AirAsia direct
04 Sep - 06 Sep Thai AirAsia direct
04 Sep - 15 Sep Thai AirAsia direct
11 Sep - 13 Sep Thai AirAsia direct
12 Sep - 02 Oct Thai AirAsia direct
20 Sep - 04 Oct Thai AirAsia direct
20 Sep - 02 Oct Thai AirAsia direct
20 Sep - 07 Oct Thai AirAsia direct
20 Sep - 05 Oct Thai AirAsia direct
13 Sep - 02 Oct Thai AirAsia direct
19 Sep - 02 Oct Thai AirAsia direct
19 Sep - 05 Oct Thai AirAsia direct
19 Sep - 04 Oct Thai AirAsia direct
19 Sep - 07 Oct Thai AirAsia direct

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

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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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