Cheapest return flights from Ontario to Barcelona in September from $743

Best time to book flights for Ontario (ONT) to Barcelona (BCN) flights at AirHint

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

Return flights

19 Sep - 26 Sep British Airways
02 Sep - 09 Sep British Airways
20 Sep - 04 Oct Iberia
16 Sep - 23 Sep Iberia
02 Sep - 16 Sep Iberia
03 Sep - 17 Sep Iberia
02 Sep - 17 Sep Iberia
03 Sep - 26 Sep Iberia
24 Sep - 15 Oct Iberia
19 Sep - 03 Oct Iberia
03 Sep - 08 Sep Iberia
01 Sep - 15 Sep Iberia
04 Sep - 11 Sep Iberia
24 Sep - 08 Oct Iberia
20 Sep - 11 Oct jetBlue
26 Sep - 04 Oct jetBlue
30 Sep - 12 Oct jetBlue
18 Sep - 06 Oct Avianca

Also check the deals for one-way flights from Ontario to Barcelona in September.

Skyscanner

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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