Cheapest return flights from Montreal to Keflavik in September from $563

Best time to book flights for Montreal (YUL) to Keflavik (KEF) flights at AirHint

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

Return flights

13 Sep - 24 Sep Air Canada
17 Sep - 24 Sep Air Canada
13 Sep - 20 Sep Air Canada
22 Sep - 29 Sep Air Canada
04 Sep - 10 Sep Air Canada
08 Sep - 15 Sep Air Canada
10 Sep - 17 Sep Air Canada
16 Sep - 23 Sep Air Canada
11 Sep - 18 Sep Air Canada
12 Sep - 19 Sep Air Canada
30 Sep - 07 Oct Air Canada
29 Sep - 06 Oct Air Canada
27 Sep - 04 Oct Air Canada
25 Sep - 02 Oct Air Canada
24 Sep - 01 Oct Air Canada
26 Sep - 03 Oct Porter Airlines (Canada) Ltd
28 Sep - 05 Oct Porter Airlines (Canada) Ltd

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

Skyscanner

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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