Cheapest return flights from Ontario to Barcelona in May from $716

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

Return flights

06 May - 13 May Frontier Airlines
09 May - 18 May British Airways
12 May - 22 May British Airways
01 May - 11 May British Airways
04 May - 15 May British Airways
08 May - 18 May British Airways
13 May - 22 May Lufthansa
08 May - 15 May Lufthansa
10 May - 17 May British Airways
13 May - 21 May Iberia
19 May - 02 Jun SWISS
25 May - 01 Jun Turkish Airlines
29 May - 13 Jun Turkish Airlines
25 May - 07 Jun Iberia
26 May - 02 Jun jetBlue
28 May - 04 Jun jetBlue
27 May - 06 Jun Turkish Airlines
28 May - 03 Jun jetBlue
30 May - 06 Jun jetBlue
31 May - 07 Jun jetBlue

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

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