Cheapest return flights from Montreal to Porto in September from $533

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

Return flights

02 Sep - 23 Sep Air Transat direct
23 Sep - 10 Oct Air Transat direct
30 Sep - 10 Oct Air Transat direct
02 Sep - 09 Sep Air Transat direct
03 Sep - 10 Sep Air Transat
14 Sep - 23 Sep Air Transat
15 Sep - 24 Sep Air Transat
29 Sep - 06 Oct Air Transat
26 Sep - 10 Oct Air Transat
28 Sep - 05 Oct Air Transat
08 Sep - 21 Sep Air Transat direct
13 Sep - 21 Sep Air Transat direct
17 Sep - 24 Sep Air Transat
13 Sep - 22 Sep Air Transat
01 Sep - 08 Sep Air Canada
27 Sep - 12 Oct Azores Airlines
30 Sep - 12 Oct Azores Airlines
26 Sep - 03 Oct FrenchBee
24 Sep - 01 Oct Air Canada
25 Sep - 02 Oct Azores Airlines

Also check the deals for one-way flights from Montreal to Porto 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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