AirHint found the following cheapest return flights from Ottawa (YOW) to Istanbul (IST) in May 2026 (see full year).

Return flights

12 May - 02 Jun	WestJet
10 May - 03 Jun	WestJet
12 May - 15 May	WestJet
12 May - 26 May	WestJet
05 May - 12 May	WestJet
12 May - 27 May	WestJet
23 May - 05 Jun	WestJet
26 May - 05 Jun	WestJet
05 May - 26 May	WestJet
12 May - 23 May	WestJet
23 May - 02 Jun	WestJet
26 May - 17 Jun	WestJet
12 May - 05 Jun	WestJet
05 May - 25 May	WestJet
19 May - 09 Jun	WestJet
12 May - 22 May	WestJet
05 May - 19 May	WestJet
26 May - 16 Jun	WestJet
13 May - 02 Jun	WestJet
05 May - 20 May	WestJet

Also check the deals for one-way flights from Ottawa to Istanbul in May.

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.

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Cheapest return flights from Ottawa to Istanbul in May from $676

Return flights