AirHint found the following cheapest return flights from Sydney (SYD) to Colombo (CMB) in December 2025 (see full year).

Return flights

28 Dec - 30 Dec	China Eastern
31 Dec - 14 Jan	AirAsia X
27 Dec - 29 Dec	Batik Air Malaysia
23 Dec - 30 Dec	AirAsia X
25 Dec - 29 Dec	AirAsia X
21 Dec - 30 Dec	Batik Air Malaysia
27 Dec - 07 Jan	AirAsia X
30 Dec - 31 Jan	AirAsia X
29 Dec - 01 Jan	AirAsia X
31 Dec - 26 Jan	AirAsia X
27 Dec - 01 Jan	AirAsia X
28 Dec - 05 Jan	China Eastern
23 Dec - 28 Dec	AirAsia X
25 Dec - 15 Jan	Batik Air Malaysia
21 Dec - 31 Dec	Batik Air Malaysia
21 Dec - 23 Dec	Batik Air Malaysia
19 Dec - 30 Dec	AirAsia X
30 Dec - 02 Jan	AirAsia X
19 Dec - 26 Dec	AirAsia X
29 Dec - 09 Jan	AirAsia X

Also check the deals for one-way flights from Sydney to Colombo in December.

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 Sydney to Colombo in December from 731€

Return flights