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

Return flights

03 Dec - 14 Dec	Alaska Airlines
08 Dec - 29 Dec	China Airlines
04 Dec - 28 Dec	Alaska Airlines
12 Dec - 08 Jan	STARLUX Airlines
08 Dec - 08 Jan	Qatar Airways
10 Dec - 08 Jan	STARLUX Airlines
23 Dec - 29 Dec	Alaska Airlines
09 Dec - 08 Jan	Qatar Airways
11 Dec - 08 Jan	Qatar Airways
20 Dec - 03 Jan	STARLUX Airlines
27 Dec - 28 Jan	Qatar Airways
12 Dec - 04 Jan	Qatar Airways

Also check the deals for one-way flights from Ontario 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 Ontario to Colombo in December from $1457

Return flights