AirHint found the following cheapest return flights from Toronto (YYZ) to Keflavik (KEF) in October 2025 (see full year).

Return flights

02 Oct - 09 Oct	WestJet
06 Oct - 17 Oct	Icelandair	direct
16 Oct - 20 Oct	Icelandair	direct
16 Oct - 23 Oct	Icelandair	direct
17 Oct - 24 Oct	Icelandair	direct
12 Oct - 19 Oct	Icelandair	direct
13 Oct - 20 Oct	Icelandair	direct
18 Oct - 25 Oct	Icelandair	direct
19 Oct - 26 Oct	Icelandair	direct
20 Oct - 27 Oct	Icelandair	direct
25 Oct - 01 Nov	Icelandair	direct
30 Oct - 08 Nov	Air Transat

Also check the deals for one-way flights from Toronto to Keflavik in October.

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 Toronto to Keflavik in October from $536

Return flights