Cheapest return flights from Keflavik to Lisbon in December from 139€

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

Return flights

09 Dec - 13 Dec easyJet
06 Dec - 13 Dec easyJet
11 Dec - 14 Dec easyJet
11 Dec - 18 Dec easyJet
09 Dec - 23 Dec easyJet
16 Dec - 31 Dec easyJet
07 Dec - 13 Dec Wizz Air
30 Dec - 06 Jan easyJet
14 Dec - 20 Dec easyJet
07 Dec - 11 Dec easyJet
07 Dec - 11 Dec Icelandair direct
13 Dec - 05 Jan easyJet
18 Dec - 01 Jan easyJet
18 Dec - 03 Jan easyJet
21 Dec - 04 Jan TUI
21 Dec - 01 Jan TUI
27 Dec - 01 Jan easyJet
19 Dec - 04 Jan Wizz Air Malta
26 Dec - 01 Jan easyJet
18 Dec - 01 Jan Icelandair direct

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

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