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

Return flights

05 Aug - 11 Aug	IndiGo
18 Aug - 25 Aug	IndiGo
07 Aug - 14 Aug	Air India
13 Aug - 20 Aug	Thai AirAsia
23 Aug - 30 Aug	IndiGo
14 Aug - 20 Aug	Air India
01 Aug - 03 Aug	Air India
08 Aug - 15 Aug	Air India
10 Aug - 17 Aug	Air India
30 Aug - 06 Sep	IndiGo
31 Aug - 06 Sep	IndiGo
11 Aug - 18 Aug	Air India
28 Aug - 03 Sep	IndiGo
23 Aug - 18 Sep	Air India
30 Aug - 06 Sep	Singapore Airlines	direct
31 Aug - 06 Sep	Singapore Airlines	direct
28 Aug - 03 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.

Book a cheap hotel in Singapore

Cheap car rent in Singapore

Cheapest return flights from Kathmandu to Singapore in August from 284€

Return flights