Cheapest one-way flights from Ontario to Barcelona in May from $383

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 May 2025 (see full year).

One-Way flights

13 May Frontier Airlines
07 May Frontier Airlines
18 May Frontier Airlines
10 May Frontier Airlines
19 May British Airways
14 May British Airways
09 May KLM
24 May jetBlue
15 May jetBlue
05 May British Airways

Also check the deals for return 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