AirHint found the following cheapest one-way flights from Ontario (ONT) to Porto (OPO) in April 2026 (see full year).
One-Way flights
| 20 Apr | Iberia | ||
| 16 Apr | Iberia | ||
| 18 Apr | Iberia | ||
| 08 Apr | Iberia | ||
| 13 Apr | Iberia | ||
| 15 Apr | Iberia | ||
| 21 Apr | Iberia | ||
| 22 Apr | Iberia | ||
| 28 Apr | Iberia | ||
| 29 Apr | Iberia |
Also check the deals for return flights from Ontario to Porto in April.
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