Cheapest return LIS–KEF flights, December

AirHint found the following cheapest return flights from Lisbon (LIS) to Keflavik (KEF) in December 2026 (see full year).

Return flights

09 Dec - 16 Dec easyJet
07 Dec - 14 Dec easyJet
10 Dec - 17 Dec easyJet
01 Dec - 08 Dec easyJet
02 Dec - 09 Dec easyJet
05 Dec - 12 Dec easyJet
08 Dec - 15 Dec easyJet
06 Dec - 13 Dec easyJet
12 Dec - 19 Dec easyJet
14 Dec - 21 Dec easyJet
30 Dec - 06 Jan Transavia France
29 Dec - 05 Jan TAP
25 Dec - 01 Jan Transavia France
28 Dec - 04 Jan easyJet
29 Dec - 05 Jan Icelandair direct
27 Dec - 03 Jan TAP

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

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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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