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

Return flights

09 Oct - 11 Nov	easyJet
09 Oct - 11 Nov	Fly Play	direct
06 Oct - 13 Oct	Fly Play	direct
13 Oct - 20 Oct	Fly Play	direct
06 Oct - 14 Oct	Fly Play	direct
14 Oct - 20 Oct	Fly Play	direct
21 Oct - 29 Oct	easyJet
08 Oct - 15 Oct	Ryanair
21 Oct - 29 Oct	Fly Play	direct
13 Oct - 19 Oct	Vueling Airlines
09 Oct - 16 Oct	Fly Play	direct
08 Oct - 10 Nov	Ryanair
08 Oct - 15 Oct	Icelandair	direct

Also check the deals for one-way flights from Tenerife 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 Tenerife to Keflavik in October from $251

Return flights