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

Return flights

01 Aug - 08 Aug	IndiGo
01 Aug - 06 Aug	IndiGo
14 Aug - 21 Aug	IndiGo
14 Aug - 18 Aug	IndiGo
10 Aug - 17 Aug	Singapore Airlines	direct
01 Aug - 08 Aug	Singapore Airlines	direct
14 Aug - 18 Aug	Singapore Airlines	direct
01 Aug - 06 Aug	Singapore Airlines	direct
14 Aug - 21 Aug	Singapore Airlines	direct

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

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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Cheapest return flights from Kathmandu to Singapore in August from $314

Return flights