Cheapest one-way flights from Singapore to Kathmandu in September from $233

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

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

One-Way flights

07 Sep SriLankan Airlines
15 Sep Thai Airways
27 Sep IndiGo
22 Sep IndiGo
07 Sep Singapore Airlines direct
15 Sep Singapore Airlines direct
22 Sep Singapore Airlines direct
27 Sep Singapore Airlines direct

Also check the deals for return 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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