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

Return flights

13 Oct - 20 Oct	Air Transat
12 Oct - 26 Oct	Air Transat
19 Oct - 26 Oct	Air Transat
12 Oct - 19 Oct	Air Transat
26 Oct - 02 Nov	Air Transat
01 Oct - 08 Oct	FrenchBee
31 Oct - 07 Nov	Air Transat
27 Oct - 03 Nov	Air Transat
09 Oct - 16 Oct	Porter Airlines (Canada) Ltd
08 Oct - 15 Oct	FrenchBee
20 Oct - 27 Oct	Air Transat
11 Oct - 18 Oct	Air Canada
18 Oct - 25 Oct	Air Canada
25 Oct - 01 Nov	Air Canada
01 Oct - 01 Nov	Air Canada
28 Oct - 04 Nov	SWISS
29 Oct - 05 Nov	SWISS
30 Oct - 06 Nov	SWISS
28 Oct - 11 Nov	Air Canada

Also check the deals for one-way flights from Montreal to Copenhagen in October.

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 October from $646

Return flights