Cheapest return flights from Ontario to Lisbon in April from $458

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

Return flights

21 Apr - 01 May British Airways
21 Apr - 28 Apr British Airways
24 Apr - 01 May British Airways
17 Apr - 24 Apr British Airways
11 Apr - 21 Apr British Airways
22 Apr - 02 May British Airways
11 Apr - 25 Apr British Airways
27 Apr - 12 May British Airways
03 Apr - 10 Apr British Airways
05 Apr - 12 Apr British Airways
07 Apr - 14 Apr British Airways
01 Apr - 07 Apr British Airways
03 Apr - 12 Apr British Airways
03 Apr - 11 Apr British Airways

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

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