Cheapest return flights from Sydney to Kathmandu in September from $636

Best time to book flights for Sydney (SYD) to Kathmandu (KTM) flights at AirHint

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

Return flights

03 Sep - 24 Sep Singapore Airlines
11 Sep - 17 Oct Singapore Airlines
06 Sep - 27 Sep Singapore Airlines
05 Sep - 20 Oct Singapore Airlines
12 Sep - 25 Sep Singapore Airlines
10 Sep - 22 Sep Singapore Airlines
06 Sep - 16 Oct Qantas
26 Sep - 26 Oct Scoot Tigerair
05 Sep - 06 Oct Singapore Airlines
17 Sep - 02 Oct Cathay Pacific
12 Sep - 14 Oct Singapore Airlines
05 Sep - 12 Oct Singapore Airlines
15 Sep - 29 Oct Cathay Pacific
05 Sep - 08 Oct Singapore Airlines
16 Sep - 30 Sep Air India
22 Sep - 29 Sep Malaysia Airlines
22 Sep - 28 Sep Cathay Pacific

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

Skyscanner

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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