AirHint found the following cheapest return flights from Montreal (YUL) to Athens (ATH) in September 2026 (see full year).

Return flights

09 Sep - 16 Sep	Air Transat
30 Sep - 07 Oct	Air Transat
04 Sep - 11 Sep	FrenchBee
16 Sep - 23 Sep	Air Transat
23 Sep - 30 Sep	Air Transat
11 Sep - 23 Sep	Air Transat
13 Sep - 23 Sep	Air Transat
20 Sep - 27 Sep	FrenchBee
18 Sep - 27 Sep	FrenchBee
16 Sep - 27 Sep	FrenchBee
10 Sep - 17 Sep	Air Transat
14 Sep - 01 Oct	Air Canada	direct
30 Sep - 07 Oct	Air Canada	direct
13 Sep - 07 Oct	Air Canada	direct
30 Sep - 17 Oct	FrenchBee
27 Sep - 17 Oct	FrenchBee
18 Sep - 17 Oct	FrenchBee
27 Sep - 04 Oct	FrenchBee
16 Sep - 02 Oct	FrenchBee
25 Sep - 02 Oct	FrenchBee

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

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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Cheapest return flights from Montreal to Athens in September from $683

Return flights