AirHint found the following cheapest return flights from Hangzhou (HGH) to Singapore (SIN) in September 2025 (see full year).

Return flights

23 Sep - 30 Sep	Hainan Airlines
19 Sep - 22 Sep	Cathay Pacific
25 Sep - 03 Oct	Cathay Pacific
20 Sep - 29 Sep	Scoot	direct
28 Sep - 04 Oct	Shandong Airlines
26 Sep - 29 Sep	Cathay Pacific
28 Sep - 05 Oct	Shandong Airlines
26 Sep - 26 Sep	Cathay Pacific
29 Sep - 06 Oct	Shenzhen Airlines
28 Sep - 04 Oct	Scoot	direct
30 Sep - 27 Oct	China Southern
22 Sep - 25 Sep	AirAsia X
25 Sep - 03 Oct	Scoot	direct
22 Sep - 02 Oct	AirAsia X
30 Sep - 27 Oct	Scoot	direct
22 Sep - 27 Sep	AirAsia X
24 Sep - 15 Oct	AirAsia
26 Sep - 29 Sep	Scoot	direct
24 Sep - 25 Sep	AirAsia
24 Sep - 27 Sep	AirAsia

Also check the deals for one-way flights from Hangzhou to Singapore in September.

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 Hangzhou to Singapore in September from $271

Return flights