AirHint found the following cheapest return flights from Toronto (YYZ) to Bucharest (OTP) in September 2025 (see full year).

Return flights

08 Sep - 15 Sep	WestJet
22 Sep - 08 Oct	Porter Airlines (Canada) Ltd
17 Sep - 24 Sep	WestJet
03 Sep - 08 Sep	TAP
22 Sep - 18 Oct	Porter Airlines (Canada) Ltd
21 Sep - 11 Oct	WestJet
27 Sep - 18 Oct	WestJet
16 Sep - 23 Sep	WestJet
27 Sep - 20 Oct	WestJet
15 Sep - 22 Sep	Porter Airlines (Canada) Ltd
01 Sep - 30 Sep	TAP
05 Sep - 10 Sep	Porter Airlines (Canada) Ltd
13 Sep - 20 Sep	WestJet
18 Sep - 25 Sep	TAP
01 Sep - 27 Sep	TAP
26 Sep - 10 Oct	Air Transat
14 Sep - 01 Oct	TAP
11 Sep - 03 Oct	WestJet

Also check the deals for one-way flights from Toronto to Bucharest in September.

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 Toronto to Bucharest in September from $581

Return flights