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

Return flights

05 Oct - 21 Oct	Air India
20 Oct - 27 Nov	Air India
20 Oct - 20 Nov	Air India
22 Oct - 14 Nov	Singapore Airlines
20 Oct - 22 Nov	Air India
29 Oct - 27 Nov	Air India
19 Oct - 21 Oct	Qantas
22 Oct - 17 Nov	Singapore Airlines
16 Oct - 10 Nov	Air India
19 Oct - 22 Nov	Malaysia Airlines
28 Oct - 09 Nov	Air India
13 Oct - 20 Nov	Air India
19 Oct - 20 Oct	Air India
17 Oct - 20 Oct	Air India
18 Oct - 20 Oct	Air India
05 Oct - 14 Oct	Air India
10 Oct - 24 Oct	Air India
02 Oct - 09 Oct	Air India
21 Oct - 28 Oct	Air India
14 Oct - 24 Oct	Air India

Also check the deals for one-way flights from Sydney 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 Sydney to Kathmandu in October from $828

Return flights