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

Return flights

26 Dec - 31 Jan	Singapore Airlines
14 Dec - 30 Dec	Singapore Airlines
26 Dec - 04 Jan	Singapore Airlines
25 Dec - 15 Jan	Qantas
14 Dec - 14 Jan	Singapore Airlines
15 Dec - 12 Jan	Singapore Airlines
20 Dec - 20 Jan	Singapore Airlines
22 Dec - 12 Jan	Singapore Airlines
20 Dec - 10 Jan	Singapore Airlines
20 Dec - 04 Jan	Singapore Airlines

Also check the deals for one-way flights from Adelaide 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 Adelaide to Colombo in December from $1398

Return flights