AirHint found the following cheapest return flights from Ontario (ONT) to Barcelona (BCN) in October 2026 (see full year).
Return flights
| 10 Oct - 24 Oct | Iberia | ||
| 04 Oct - 14 Oct | British Airways | ||
| 07 Oct - 17 Oct | Iberia | ||
| 18 Oct - 31 Oct | Iberia | ||
| 08 Oct - 18 Oct | Iberia |
Also check the deals for one-way flights from Ontario to Barcelona in October.
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