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

Return flights

24 Sep - 18 Oct	Iberia
30 Sep - 05 Oct	Iberia
24 Sep - 01 Oct	Iberia
21 Sep - 25 Sep	Delta
26 Sep - 02 Oct	Delta
25 Sep - 02 Oct	Delta
29 Sep - 03 Oct	Delta
30 Sep - 09 Oct	Air Canada
30 Sep - 03 Oct	Air Transat
28 Sep - 03 Oct	Delta
23 Sep - 03 Oct	Delta
22 Sep - 26 Sep	Delta
23 Sep - 30 Sep	Delta
21 Sep - 26 Sep	Delta
18 Sep - 23 Sep	Air Transat
21 Sep - 24 Sep	Air Transat
20 Sep - 26 Sep	British Airways
21 Sep - 23 Sep	Air Transat
19 Sep - 26 Sep	WestJet
17 Sep - 19 Sep	Azores Airlines

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 448€

Return flights