Cheapest return flights from Montreal to Keflavik in September from $569

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

Return flights

03 Sep - 10 Sep Air Canada
09 Sep - 16 Sep Porter Airlines (Canada) Ltd
02 Sep - 09 Sep Air Canada
08 Sep - 15 Sep Air Canada
17 Sep - 24 Sep Porter Airlines (Canada) Ltd
10 Sep - 17 Sep Air Canada
04 Sep - 10 Sep Air Canada
04 Sep - 17 Sep Air Canada
27 Sep - 04 Oct Porter Airlines (Canada) Ltd
20 Sep - 24 Sep Porter Airlines (Canada) Ltd
16 Sep - 23 Sep Porter Airlines (Canada) Ltd
29 Sep - 06 Oct Porter Airlines (Canada) Ltd
20 Sep - 01 Oct Porter Airlines (Canada) Ltd
27 Sep - 01 Oct Porter Airlines (Canada) Ltd
27 Sep - 05 Oct Porter Airlines (Canada) Ltd
26 Sep - 01 Oct WestJet
24 Sep - 01 Oct Porter Airlines (Canada) Ltd
25 Sep - 05 Oct Porter Airlines (Canada) Ltd
26 Sep - 04 Oct Porter Airlines (Canada) Ltd
30 Sep - 07 Oct Air Canada

Also check the deals for one-way flights from Montreal to Keflavik in September.

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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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