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
01 Oct - 08 Oct	FrenchBee
09 Oct - 16 Oct	Air Transat
26 Oct - 02 Nov	Air Transat
23 Oct - 30 Oct	Air Transat
20 Oct - 27 Oct	Air Transat
22 Oct - 29 Oct	FrenchBee
24 Oct - 31 Oct	Air Transat
16 Oct - 26 Oct	Air Transat
14 Oct - 21 Oct	WestJet
03 Oct - 10 Oct	Air Transat
25 Oct - 01 Nov	Air Transat
30 Oct - 06 Nov	Air Transat
28 Oct - 04 Nov	Air France
27 Oct - 03 Nov	Air France
29 Oct - 05 Nov	KLM
22 Oct - 15 Nov	KLM
31 Oct - 07 Nov	WestJet

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 545€

Return flights