Cheapest return flights from Kathmandu to Singapore in September from $447

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

Return flights

24 Sep - 05 Oct SriLankan Airlines
30 Sep - 09 Oct Nepal Airlines
18 Sep - 21 Sep Thai AirAsia
24 Sep - 30 Sep Thai AirAsia
25 Sep - 30 Sep Thai Lion Air
24 Sep - 25 Sep Thai AirAsia
20 Sep - 27 Sep Nepal Airlines
23 Sep - 05 Oct Thai AirAsia
30 Sep - 07 Oct Thai AirAsia
26 Sep - 05 Oct Thai AirAsia
17 Sep - 21 Sep Thai AirAsia
17 Sep - 18 Sep Thai Airways
26 Sep - 01 Oct Thai AirAsia
21 Sep - 22 Sep Thai AirAsia
27 Sep - 06 Oct Thai AirAsia
26 Sep - 02 Oct Singapore Airlines direct
26 Sep - 03 Oct Singapore Airlines direct
30 Sep - 07 Oct Singapore Airlines direct
18 Sep - 21 Sep Singapore Airlines direct

Also check the deals for one-way flights from Kathmandu to Singapore 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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