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

Return flights

22 Sep - 29 Sep	Air Transat
15 Sep - 22 Sep	Air Transat
02 Sep - 09 Sep	Air Transat
24 Sep - 01 Oct	Air Transat
29 Sep - 06 Oct	Air Transat
10 Sep - 17 Sep	Air Transat
07 Sep - 14 Sep	Air Transat
17 Sep - 24 Sep	Air Transat
14 Sep - 21 Sep	Air Transat
28 Sep - 05 Oct	Porter Airlines (Canada) Ltd
01 Sep - 08 Sep	Air Transat
03 Sep - 10 Sep	Air Transat
16 Sep - 23 Sep	Porter Airlines (Canada) Ltd
25 Sep - 02 Oct	Air Transat
30 Sep - 07 Oct	SWISS
27 Sep - 04 Oct	Air Transat
26 Sep - 03 Oct	KLM

Also check the deals for one-way flights from Montreal to Stockholm 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 Stockholm in September from $601

Return flights