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

Return flights

23 Sep - 03 Oct	Vueling Airlines
23 Sep - 06 Oct	Vueling Airlines
24 Sep - 04 Oct	Iberia Express
23 Sep - 04 Oct	canaryfly
27 Sep - 07 Oct	Vueling Airlines
04 Sep - 20 Sep	Vueling Airlines
25 Sep - 04 Oct	Vueling Airlines
25 Sep - 06 Oct	canaryfly
16 Sep - 27 Sep	Iberia Express
13 Sep - 25 Sep	canaryfly
15 Sep - 27 Sep	Vueling Airlines
04 Sep - 10 Sep	Iberia
05 Sep - 21 Sep	Binter Canarias
11 Sep - 18 Sep	Vueling Airlines
25 Sep - 05 Oct	canaryfly
04 Sep - 11 Sep	Iberia
28 Sep - 05 Oct	Ryanair
29 Sep - 06 Oct	Vueling Airlines

Also check the deals for one-way flights from Tenerife 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.

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Cheapest return flights from Tenerife to Keflavik in September from $280

Return flights