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

Return flights

19 Oct - 07 Nov	AirAsia X
19 Oct - 28 Oct	AirAsia X
11 Oct - 14 Nov	Cebu Pacific
28 Oct - 28 Nov	Malaysia Airlines
07 Oct - 23 Oct	SriLankan Airlines
20 Oct - 20 Nov	Air India
20 Oct - 10 Nov	Air India
20 Oct - 17 Nov	Air India
22 Oct - 10 Nov	Air India
22 Oct - 24 Nov	Air India
30 Oct - 16 Nov	Qantas
10 Oct - 17 Oct	Qantas
02 Oct - 16 Oct	Qantas
19 Oct - 27 Nov	Air India
08 Oct - 22 Oct	Malaysia Airlines
12 Oct - 21 Oct	Qantas
22 Oct - 29 Oct	Air India
01 Oct - 19 Oct	Air India
04 Oct - 19 Oct	Malaysia Airlines
02 Oct - 18 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 554€

Return flights