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

Return flights

29 Oct - 15 Nov	Scoot
21 Oct - 28 Oct	Scoot
30 Oct - 15 Nov	Hainan Airlines
30 Oct - 02 Nov	Scoot
18 Oct - 11 Nov	Scoot
21 Oct - 24 Nov	SriLankan Airlines
22 Oct - 16 Nov	Qantas
21 Oct - 04 Nov	Qantas
21 Oct - 11 Nov	Qantas
20 Oct - 20 Nov	Cathay Pacific
20 Oct - 28 Nov	Cathay Pacific
17 Oct - 24 Oct	VietJet Air
20 Oct - 31 Oct	IndiGo
22 Oct - 28 Oct	IndiGo
22 Oct - 24 Oct	Air India
28 Oct - 31 Oct	IndiGo
21 Oct - 31 Oct	IndiGo
22 Oct - 29 Oct	IndiGo
22 Oct - 27 Oct	Air India
21 Oct - 29 Oct	IndiGo

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.

Book a cheap hotel in Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from Sydney to Kathmandu in October from 574€

Return flights