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

Return flights

03 Dec - 10 Dec	United
08 Dec - 15 Dec	United
01 Dec - 15 Dec	SWISS
28 Dec - 11 Jan	SWISS
31 Dec - 14 Jan	SWISS
08 Dec - 21 Dec	Iberia
04 Dec - 11 Dec	Iberia
17 Dec - 22 Dec	British Airways
28 Dec - 04 Jan	United
18 Dec - 25 Dec	United
17 Dec - 29 Dec	British Airways
13 Dec - 27 Dec	Condor
09 Dec - 23 Dec	Alaska Airlines
26 Dec - 05 Jan	British Airways
20 Dec - 03 Jan	Condor
20 Dec - 18 Jan	KLM
22 Dec - 03 Jan	Alaska Airlines

Also check the deals for one-way flights from Ontario to Frankfurt 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 Frankfurt in December from $755

Return flights