AirHint found the following cheapest return flights from Ontario (ONT) to Barcelona (BCN) in May 2026 (see full year).

Return flights

05 May - 19 May	British Airways
04 May - 30 May	British Airways
12 May - 11 Jun	Iberia
14 May - 21 May	Iberia
16 May - 06 Jun	Iberia
11 May - 26 May	Iberia
02 May - 24 May	British Airways
08 May - 22 May	SWISS
08 May - 20 May	SWISS
13 May - 06 Jun	British Airways
18 May - 04 Jun	jetBlue
08 May - 27 May	jetBlue
23 May - 26 May	British Airways
08 May - 18 May	jetBlue
20 May - 13 Jun	jetBlue
24 May - 13 Jun	jetBlue
22 May - 13 Jun	jetBlue
13 May - 12 Jun	jetBlue
30 May - 20 Jun	jetBlue
27 May - 10 Jun	jetBlue

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

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 Ontario to Barcelona in May from $920

Return flights