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

Return flights

09 Sep - 16 Sep	Fly Play	direct
06 Sep - 13 Sep	Fly Play	direct
13 Sep - 16 Sep	Fly Play	direct
18 Sep - 22 Sep	Ryanair
16 Sep - 23 Sep	Fly Play	direct
25 Sep - 02 Oct	easyJet
02 Sep - 06 Sep	Ryanair
13 Sep - 20 Sep	Ryanair
20 Sep - 30 Sep	Fly Play	direct
13 Sep - 20 Sep	Fly Play	direct
16 Sep - 25 Sep	Jet2
09 Sep - 09 Oct	Fly Play	direct
09 Sep - 09 Oct	easyJet

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 $269

Return flights