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

Return flights

29 Aug - 05 Sep	Porter Airlines (Canada) Ltd
12 Aug - 19 Aug	Porter Airlines (Canada) Ltd
16 Aug - 23 Aug	Porter Airlines (Canada) Ltd
19 Aug - 29 Aug	Air Canada
21 Aug - 28 Aug	Air Canada	direct
26 Aug - 10 Sep	Air Canada	direct
22 Aug - 29 Aug	Air Canada	direct
02 Aug - 07 Aug	Air Canada	direct
21 Aug - 27 Aug	Air Canada	direct
19 Aug - 25 Aug	Porter Airlines (Canada) Ltd
20 Aug - 28 Aug	Air Canada	direct
20 Aug - 27 Aug	Air Canada	direct
30 Aug - 06 Sep	Porter Airlines (Canada) Ltd
30 Aug - 07 Sep	Porter Airlines (Canada) Ltd
27 Aug - 03 Sep	Air Canada
28 Aug - 04 Sep	Air Canada
23 Aug - 03 Sep	Air Canada
28 Aug - 05 Sep	Air Canada
30 Aug - 12 Sep	Air Canada	direct
29 Aug - 10 Sep	Air Canada

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

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 Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Montreal to Keflavik in August from 745CAD

Return flights