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

Return flights

07 Oct - 16 Oct	SriLankan Airlines
30 Oct - 12 Nov	Thai AirAsia
08 Oct - 16 Oct	SriLankan Airlines
17 Oct - 19 Oct	Air India
02 Oct - 05 Oct	Air India
01 Oct - 14 Oct	Air India
15 Oct - 22 Oct	Air India
16 Oct - 23 Oct	Air India
16 Oct - 21 Oct	Air India
04 Oct - 12 Oct	Air India
02 Oct - 09 Oct	Air India
22 Oct - 05 Nov	Air India
15 Oct - 05 Nov	Air India
27 Oct - 08 Nov	Air India
25 Oct - 02 Nov	Air India
20 Oct - 02 Nov	Air India
17 Oct - 01 Nov	Air India
27 Oct - 09 Nov	Air India
16 Oct - 01 Nov	Thai AirAsia
22 Oct - 05 Nov	Singapore Airlines	direct

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

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 Singapore to Kathmandu in October from $359

Return flights