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

Return flights

23 Aug - 27 Aug	IndiGo
21 Aug - 28 Aug	IndiGo
21 Aug - 26 Aug	IndiGo
20 Aug - 27 Aug	Air India
29 Aug - 05 Sep	Air India
19 Aug - 26 Aug	IndiGo
18 Aug - 30 Aug	Thai AirAsia
23 Aug - 31 Aug	IndiGo
23 Aug - 30 Aug	IndiGo
20 Aug - 25 Aug	Air India
31 Aug - 10 Sep	IndiGo
18 Aug - 25 Aug	Thai AirAsia
31 Aug - 06 Sep	IndiGo
31 Aug - 12 Sep	IndiGo
30 Aug - 13 Sep	IndiGo
31 Aug - 10 Sep	Singapore Airlines	direct
31 Aug - 06 Sep	Singapore Airlines	direct
29 Aug - 05 Sep	Singapore Airlines	direct
30 Aug - 13 Sep	Singapore Airlines	direct
31 Aug - 12 Sep	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 277€

Return flights