Cheapest return flights from Keflavik to Lisbon in December from 171€

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

Return flights

05 Dec - 12 Dec Fly Play direct
14 Dec - 21 Dec Fly Play
14 Dec - 21 Dec Icelandair direct
28 Dec - 04 Jan easyJet
07 Dec - 28 Dec Fly Play
21 Dec - 28 Dec Scandinavian Airlines
21 Dec - 28 Dec Icelandair direct
28 Dec - 04 Jan Icelandair direct

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

Skyscanner

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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