Cheapest return flights from Lisbon to Keflavik in December from $190

Best time to book flights for Lisbon (LIS) to Keflavik (KEF) flights at AirHint

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

Return flights

08 Dec - 12 Dec Fly Play direct
03 Dec - 09 Dec easyJet
09 Dec - 13 Dec easyJet
22 Dec - 02 Jan Fly Play direct
18 Dec - 22 Dec easyJet
31 Dec - 04 Jan British Airways
28 Dec - 04 Jan Icelandair direct
30 Dec - 04 Jan Ryanair
28 Dec - 02 Jan easyJet

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