Cheapest return flights from Ontario to Barcelona in May from $871

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

Return flights

05 May - 12 May British Airways
05 May - 16 May British Airways
01 May - 11 May British Airways
07 May - 21 May British Airways
06 May - 13 May British Airways
07 May - 11 May British Airways
02 May - 09 May British Airways
12 May - 22 May British Airways
13 May - 20 May Lufthansa
18 May - 26 May Lufthansa
16 May - 06 Jun British Airways
26 May - 10 Jun Lufthansa
27 May - 09 Jun SWISS
26 May - 12 Jun Iberia
18 May - 03 Jun jetBlue
29 May - 07 Jun Turkish Airlines
28 May - 04 Jun jetBlue

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

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