Cheapest return flights from Ontario to Barcelona in May from $967

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 May 2025 (see full year).

Return flights

11 May - 23 May Frontier Airlines
12 May - 20 May KLM
12 May - 22 May KLM
12 May - 23 May KLM
10 May - 20 May KLM
10 May - 23 May KLM
11 May - 24 May KLM
26 May - 05 Jun British Airways
27 May - 05 Jun British Airways
26 May - 06 Jun British Airways
27 May - 10 Jun British Airways
10 May - 17 May KLM
25 May - 06 Jun British Airways
14 May - 21 May jetBlue
26 May - 07 Jun British Airways
26 May - 04 Jun Iberia
27 May - 04 Jun Iberia
10 May - 24 May KLM
25 May - 07 Jun KLM
10 May - 05 Jun British Airways

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

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.

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona