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

Return flights

17 Sep - 24 Sep	FrenchBee
03 Sep - 10 Sep	FrenchBee
15 Sep - 22 Sep	FrenchBee
10 Sep - 17 Sep	FrenchBee
07 Sep - 23 Sep	FrenchBee
09 Sep - 16 Sep	Porter Airlines (Canada) Ltd
07 Sep - 16 Sep	FrenchBee
22 Sep - 29 Sep	Air Transat
29 Sep - 06 Oct	Air Transat
21 Sep - 28 Sep	FrenchBee
02 Sep - 09 Sep	Air Transat
26 Sep - 03 Oct	Air Transat
23 Sep - 07 Oct	Air Canada
25 Sep - 02 Oct	Air Canada
24 Sep - 01 Oct	FrenchBee
30 Sep - 07 Oct	Air Transat
28 Sep - 05 Oct	Air Transat
29 Sep - 09 Oct	Air Canada
27 Sep - 04 Oct	Lufthansa

Also check the deals for one-way flights from Montreal to Copenhagen 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 Copenhagen in September from 529€

Return flights