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

Return flights

01 Dec - 07 Dec	Singapore Airlines
11 Dec - 21 Dec	Qantas
06 Dec - 20 Dec	Qantas
13 Dec - 25 Dec	Singapore Airlines
20 Dec - 01 Jan	Malaysia Airlines
20 Dec - 02 Jan	Malaysia Airlines
16 Dec - 26 Dec	Malaysia Airlines
31 Dec - 14 Jan	Qantas
29 Dec - 02 Jan	Qantas
30 Dec - 08 Jan	Qantas
25 Dec - 06 Jan	Qantas
15 Dec - 26 Dec	Qatar Airways
02 Dec - 16 Dec	Emirates
23 Dec - 15 Jan	Qantas
16 Dec - 14 Jan	Malaysia Airlines
22 Dec - 11 Jan	Qantas
17 Dec - 09 Jan	Qantas

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 $1208

Return flights