AirHint found the following cheapest return flights from Frankfurt (FRA) to Toronto (YYZ) in September 2025 (see full year).

Return flights

20 Sep - 28 Sep	SWISS
17 Sep - 24 Sep	Ryanair
04 Sep - 18 Sep	Ryanair
10 Sep - 21 Sep	Ryanair
03 Sep - 06 Sep	Icelandair
19 Sep - 28 Sep	Ryanair
01 Sep - 21 Sep	Ryanair
05 Sep - 21 Sep	Ryanair
01 Sep - 07 Sep	Ryanair
03 Sep - 23 Sep	Ryanair
22 Sep - 06 Oct	KLM
22 Sep - 01 Oct	KLM
24 Sep - 13 Oct	KLM
19 Sep - 06 Oct	KLM
16 Sep - 01 Oct	KLM
25 Sep - 05 Oct	Icelandair
26 Sep - 05 Oct	Icelandair
24 Sep - 12 Oct	Icelandair
18 Sep - 06 Oct	Icelandair
23 Sep - 12 Oct	KLM

Also check the deals for one-way flights from Frankfurt to Toronto in September.

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 Frankfurt to Toronto in September from $476

Return flights