AirHint found the following cheapest return flights from Ottawa (YOW) to Istanbul (IST) in October 2025 (see full year).
Return flights
| 29 Oct - 22 Nov | Air Canada | ||
| 30 Oct - 22 Nov | Air Canada | ||
| 29 Oct - 01 Nov | Porter Airlines (Canada) Ltd |
Also check the deals for one-way flights from Ottawa to Istanbul in October.
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