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

Return flights

10 Aug - 19 Aug	United
09 Aug - 22 Aug	British Airways
07 Aug - 21 Aug	British Airways
11 Aug - 26 Aug	British Airways
15 Aug - 21 Aug	British Airways
25 Aug - 08 Sep	British Airways
14 Aug - 28 Aug	British Airways
11 Aug - 17 Aug	British Airways
19 Aug - 02 Sep	British Airways
21 Aug - 04 Sep	British Airways
25 Aug - 07 Sep	British Airways
21 Aug - 28 Aug	United
25 Aug - 01 Sep	United
22 Aug - 05 Sep	Iberia
31 Aug - 14 Sep	Iberia
22 Aug - 31 Aug	Iberia
18 Aug - 31 Aug	Iberia
29 Aug - 08 Sep	Iberia
26 Aug - 09 Sep	British Airways
30 Aug - 02 Sep	Condor

Also check the deals for one-way flights from Ontario to Frankfurt in August.

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 August from $700

Return flights