Cheapest return flights from Singapore to Kathmandu in September from $441

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

15 Sep - 22 Sep Cathay Pacific
16 Sep - 24 Sep Thai Airways
12 Sep - 28 Sep IndiGo
13 Sep - 20 Sep Air India
19 Sep - 29 Sep Air India
19 Sep - 30 Sep Air India
20 Sep - 27 Sep Thai Airways
20 Sep - 30 Sep Thai Airways
13 Sep - 20 Sep Singapore Airlines direct
16 Sep - 24 Sep 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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