Cheapest return flights from Montreal to Porto in September from $430

Best time to book flights for Montreal (YUL) to Porto (OPO) flights at AirHint

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

Return flights

25 Sep - 02 Oct TAP
22 Sep - 05 Oct FrenchBee
17 Sep - 24 Sep SWISS
24 Sep - 01 Oct TAP
22 Sep - 29 Sep TAP
29 Sep - 20 Oct TAP
29 Sep - 21 Oct TAP
15 Sep - 22 Sep FrenchBee
10 Sep - 17 Sep FrenchBee
29 Sep - 06 Oct FrenchBee
23 Sep - 30 Sep Azores Airlines
22 Sep - 09 Oct Azores Airlines
20 Sep - 28 Sep Azores Airlines
29 Sep - 15 Oct Azores Airlines
17 Sep - 29 Sep TAP
15 Sep - 25 Sep TAP
21 Sep - 28 Sep FrenchBee
03 Sep - 10 Sep FrenchBee
30 Sep - 22 Oct Azores Airlines
24 Sep - 15 Oct FrenchBee

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

Skyscanner

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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