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

Return flights

03 Dec - 10 Dec	British Airways
04 Dec - 11 Dec	British Airways
06 Dec - 13 Dec	Finnair
15 Dec - 22 Dec	British Airways
10 Dec - 17 Dec	British Airways
02 Dec - 13 Dec	British Airways
30 Dec - 06 Jan	Finnair
24 Dec - 31 Dec	Finnair
05 Dec - 12 Dec	Air France
22 Dec - 17 Jan	British Airways
17 Dec - 24 Dec	British Airways
27 Dec - 03 Jan	British Airways
17 Dec - 09 Jan	British Airways
23 Dec - 30 Dec	Finnair
20 Dec - 09 Jan	British Airways
22 Dec - 04 Jan	British Airways

Also check the deals for one-way flights from Ontario to Warsaw 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 Warsaw in December from $512

Return flights