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

Return flights

08 Dec - 13 Dec	easyJet
06 Dec - 13 Dec	easyJet
06 Dec - 11 Dec	easyJet
05 Dec - 09 Dec	easyJet
08 Dec - 11 Dec	easyJet
06 Dec - 08 Dec	easyJet
02 Dec - 10 Dec	easyJet
03 Dec - 10 Dec	easyJet
04 Dec - 08 Dec	Ryanair
12 Dec - 18 Dec	easyJet
23 Dec - 01 Jan	easyJet
23 Dec - 01 Jan	Icelandair	direct
29 Dec - 02 Jan	Ryanair
26 Dec - 02 Jan	Ryanair
29 Dec - 02 Jan	Icelandair	direct

Also check the deals for one-way flights from Tenerife to Keflavik in December.

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 December from $178

Return flights