Cheapest one-way flights from Ontario to Barcelona in September from $458

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

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

One-Way flights

22 Sep Iberia
17 Sep British Airways
02 Sep Alaska Airlines
20 Sep Iberia
25 Sep British Airways
06 Sep British Airways
13 Sep British Airways
11 Sep British Airways
05 Sep British Airways
04 Sep British Airways

Also check the deals for return 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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