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

Return flights

07 Sep - 12 Sep	Flair Airlines
29 Sep - 06 Oct	Icelandair	direct
14 Sep - 18 Sep	Icelandair	direct
07 Sep - 12 Sep	Icelandair	direct
17 Sep - 21 Sep	Icelandair	direct
01 Sep - 18 Sep	Icelandair	direct
15 Sep - 21 Sep	Icelandair	direct
11 Sep - 17 Sep	Icelandair	direct
23 Sep - 03 Oct	Icelandair	direct
26 Sep - 04 Oct	WestJet
21 Sep - 26 Sep	Icelandair	direct
24 Sep - 30 Sep	Icelandair	direct
22 Sep - 28 Sep	Icelandair	direct
26 Sep - 04 Oct	Icelandair	direct
26 Sep - 03 Oct	Icelandair	direct

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

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 Toronto to Keflavik in September from 385€

Return flights