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

Return flights

24 Sep - 01 Oct	Iberia
21 Sep - 01 Oct	Iberia
21 Sep - 25 Sep	Delta
23 Sep - 03 Oct	Delta
29 Sep - 03 Oct	Delta
28 Sep - 02 Oct	Delta
22 Sep - 06 Oct	Iberia
23 Sep - 06 Oct	Iberia
20 Sep - 25 Sep	Air France
22 Sep - 27 Sep	Air France
26 Sep - 01 Oct	Iberia
26 Sep - 08 Oct	Delta
25 Sep - 08 Oct	Delta
22 Sep - 26 Sep	Delta
21 Sep - 26 Sep	Delta
20 Sep - 27 Sep	Air France
25 Sep - 30 Sep	Delta
24 Sep - 30 Sep	Delta
22 Sep - 30 Sep	Delta
23 Sep - 30 Sep	Delta

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 $533

Return flights