Cheapest return flights from Singapore to Kathmandu in September from $410

Best time to book flights for Singapore (SIN) to Kathmandu (KTM) flights at AirHint

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

Return flights

21 Sep - 25 Sep SriLankan Airlines
13 Sep - 21 Sep SriLankan Airlines
17 Sep - 23 Sep Malaysia Airlines
18 Sep - 28 Sep Air India
25 Sep - 29 Sep Cathay Pacific
22 Sep - 26 Sep Air India
25 Sep - 30 Sep Air India
25 Sep - 06 Oct Air India
25 Sep - 27 Oct Air India
28 Sep - 03 Oct Air India
22 Sep - 10 Oct Air India
26 Sep - 03 Oct Air India
21 Sep - 21 Sep Air India
13 Sep - 21 Sep Singapore Airlines direct
21 Sep - 25 Sep Singapore Airlines direct
22 Sep - 10 Oct Singapore Airlines direct
26 Sep - 03 Oct Singapore Airlines direct
28 Sep - 03 Oct Singapore Airlines direct
25 Sep - 06 Oct Singapore Airlines direct
25 Sep - 27 Oct Singapore Airlines direct

Also check the deals for one-way flights from Singapore 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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