Cheapest return flights from Montreal to Lisbon in September from $335

AirHint found the following cheapest return flights from Montreal (YUL) to Lisbon (LIS) in September 2025 (see full year).

Return flights

28 Sep - 09 Oct Finnair
21 Sep - 30 Sep Finnair
01 Sep - 09 Sep Air Transat direct
09 Sep - 16 Sep Air Transat direct
02 Sep - 09 Sep Air Transat direct
08 Sep - 15 Sep Air Transat direct
10 Sep - 17 Sep Air Transat direct
01 Sep - 15 Sep Air Transat direct
03 Sep - 16 Sep Air Transat direct
01 Sep - 16 Sep Air Transat direct
02 Sep - 11 Sep Air Transat direct
24 Sep - 16 Oct Air Transat direct
30 Sep - 14 Oct Air Transat direct
14 Sep - 01 Oct British Airways
24 Sep - 01 Oct British Airways
06 Sep - 11 Oct Air France
25 Sep - 03 Oct Air France
25 Sep - 02 Oct Air France
29 Sep - 06 Oct Air France
25 Sep - 06 Oct Air France

Also check the deals for one-way flights from Montreal 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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