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

Return flights

25 Sep - 27 Sep	Qantas
28 Sep - 11 Oct	Qantas
20 Sep - 27 Sep	Qantas
19 Sep - 26 Sep	Qantas
24 Sep - 01 Oct	Qantas
19 Sep - 23 Sep	Qantas
24 Sep - 24 Oct	Jetstar
19 Sep - 08 Oct	Qantas
22 Sep - 29 Sep	Qantas
21 Sep - 28 Sep	Jetstar
26 Sep - 28 Sep	Qantas
29 Sep - 12 Oct	Qantas
24 Sep - 24 Oct	Singapore Airlines	direct
19 Sep - 09 Oct	Jetstar
29 Sep - 12 Oct	Singapore Airlines	direct
23 Sep - 30 Sep	Qantas
19 Sep - 08 Oct	Singapore Airlines	direct
21 Sep - 28 Sep	Singapore Airlines	direct
19 Sep - 26 Sep	Singapore Airlines	direct

Also check the deals for one-way flights from Cairns 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 Cairns to Singapore in September from $815

Return flights