Cheapest return flights from Sydney to Kathmandu in September from $655

AirHint found the following cheapest return flights from Sydney (SYD) to Kathmandu (KTM) in September 2026 (see full year).

Return flights

08 Sep - 26 Oct Singapore Airlines
01 Sep - 30 Sep Singapore Airlines
08 Sep - 25 Sep Singapore Airlines
21 Sep - 29 Sep Singapore Airlines
19 Sep - 18 Oct Qantas
28 Sep - 28 Oct Singapore Airlines
15 Sep - 13 Oct Cathay Pacific
20 Sep - 13 Oct Qantas
20 Sep - 18 Oct Qantas

Also check the deals for one-way flights from Sydney to Kathmandu in September.

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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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