AirHint found the following cheapest return flights from Ontario (ONT) to Barcelona (BCN) in October 2026 (see full year).
Return flights
| 01 Oct - 24 Oct | British Airways | ||
| 08 Oct - 24 Oct | Iberia | ||
| 10 Oct - 17 Oct | British Airways | ||
| 09 Oct - 16 Oct | British Airways | ||
| 13 Oct - 17 Oct | British Airways |
Also check the deals for one-way flights from Ontario to Barcelona in October.
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