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

Return flights

24 Apr - 01 May	Lufthansa
01 Apr - 08 Apr	WestJet
03 Apr - 10 Apr	WestJet
04 Apr - 11 Apr	WestJet
05 Apr - 12 Apr	WestJet
06 Apr - 13 Apr	Austrian Airlines
09 Apr - 16 Apr	WestJet
10 Apr - 17 Apr	WestJet
11 Apr - 18 Apr	WestJet
13 Apr - 20 Apr	Austrian Airlines
16 Apr - 23 Apr	WestJet
27 Apr - 04 May	WestJet
28 Apr - 05 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 694€

Return flights