Cheapest return flights from Ontario to Lisbon in September from $848

AirHint found the following cheapest return flights from Ontario (ONT) to Lisbon (LIS) in September 2026 (see full year).

Return flights

15 Sep - 06 Oct Turkish Airlines
30 Sep - 04 Oct Turkish Airlines
29 Sep - 03 Oct Turkish Airlines
11 Sep - 18 Sep Turkish Airlines

Also check the deals for one-way flights from Ontario to Lisbon in September.

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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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