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

Return flights

30 Dec - 18 Jan	British Airways
02 Dec - 10 Dec	British Airways
17 Dec - 24 Dec	British Airways
01 Dec - 08 Dec	Volaris
23 Dec - 08 Jan	British Airways
24 Dec - 07 Jan	British Airways
21 Dec - 16 Jan	British Airways
25 Dec - 14 Jan	British Airways
06 Dec - 25 Dec	Iberia
09 Dec - 16 Dec	British Airways
24 Dec - 06 Jan	British Airways
23 Dec - 31 Dec	British Airways
23 Dec - 06 Jan	British Airways
21 Dec - 07 Jan	British Airways
28 Dec - 11 Jan	British Airways
08 Dec - 15 Dec	British Airways
22 Dec - 07 Jan	British Airways
09 Dec - 23 Dec	British Airways
17 Dec - 29 Dec	British Airways
21 Dec - 28 Dec	British Airways

Also check the deals for one-way flights from Ontario to Prague 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 Prague in December from $538

Return flights