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

Return flights

25 Sep - 02 Oct	SWISS
24 Sep - 01 Oct	Air Canada
30 Sep - 07 Oct	Air Canada
29 Sep - 06 Oct	Air Canada
28 Sep - 05 Oct	FrenchBee
24 Sep - 08 Oct	Brussels Airlines
26 Sep - 03 Oct	Air France
21 Sep - 28 Sep	FrenchBee
22 Sep - 18 Oct	FrenchBee
27 Sep - 04 Oct	Air Transat
22 Sep - 29 Sep	FrenchBee
28 Sep - 18 Oct	FrenchBee
23 Sep - 30 Sep	Porter Airlines (Canada) Ltd
21 Sep - 27 Sep	FrenchBee
20 Sep - 27 Sep	Air Transat
19 Sep - 26 Sep	FrenchBee

Also check the deals for one-way flights from Montreal to Oslo 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.

Book a cheap hotel in Oslo

Cheap car rent in Oslo

Cheapest return flights from Montreal to Oslo in September from 576€

Return flights