AirHint found the following cheapest return flights from Montreal (YUL) to Keflavik (KEF) in April 2026 (see full year).

Return flights

17 Apr - 24 Apr	Lufthansa
12 Apr - 19 Apr	Lufthansa
14 Apr - 21 Apr	Lufthansa
10 Apr - 17 Apr	Lufthansa
28 Apr - 05 May	Lufthansa
24 Apr - 01 May	Lufthansa
21 Apr - 28 Apr	Lufthansa
13 Apr - 20 Apr	Austrian Airlines
06 Apr - 13 Apr	Austrian Airlines
20 Apr - 27 Apr	Austrian Airlines
01 Apr - 08 Apr	WestJet
03 Apr - 10 Apr	WestJet
27 Apr - 04 May	WestJet
29 Apr - 06 May	WestJet
30 Apr - 07 May	WestJet
25 Apr - 02 May	WestJet
26 Apr - 03 May	WestJet

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

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 Keflavik in April from 533€

Return flights