AirHint found the following cheapest return flights from Toronto (YTZ) to Barcelona (BCN) in September 2025 (see full year).

Return flights

15 Sep - 11 Oct	Air Canada
10 Sep - 17 Sep	Air Transat
10 Sep - 16 Sep	Air Transat
03 Sep - 09 Sep	Air Transat
11 Sep - 04 Oct	Air Canada
30 Sep - 09 Oct	Air Canada
30 Sep - 25 Oct	Air Canada
29 Sep - 25 Oct	Air Canada
05 Sep - 16 Sep	Air Transat
08 Sep - 18 Sep	Air Transat
28 Sep - 03 Oct	Air Canada
08 Sep - 13 Sep	Air Transat
16 Sep - 30 Sep	Porter Airlines (Canada) Ltd
20 Sep - 16 Oct	Air Canada
28 Sep - 11 Oct	Porter Airlines (Canada) Ltd
06 Sep - 13 Sep	Air Transat
13 Sep - 20 Sep	Air Transat
11 Sep - 15 Sep	Air Canada
09 Sep - 04 Oct	Air Transat
20 Sep - 11 Oct	Air Transat

Also check the deals for one-way flights from Toronto to Barcelona 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 Toronto to Barcelona in September from $547

Return flights