Cheapest return flights from Ontario to Istanbul in May from $819

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

Return flights

04 May - 11 May Lufthansa
03 May - 12 May Lufthansa
03 May - 18 May Lufthansa
02 May - 15 May Lufthansa
01 May - 15 May British Airways
07 May - 18 May British Airways
05 May - 13 May Qatar Airways
07 May - 20 May Qatar Airways
01 May - 18 May British Airways
19 May - 31 May Turkish Airlines
23 May - 23 Jun Qatar Airways
16 May - 07 Jun Alaska Airlines
21 May - 15 Jun Lufthansa
18 May - 08 Jun Alaska Airlines
18 May - 01 Jun Alaska Airlines
25 May - 01 Jun Qatar Airways
25 May - 10 Jun British Airways
20 May - 01 Jun Qatar Airways
29 May - 12 Jun Turkish Airlines
30 May - 10 Jun Alaska Airlines

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

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