Cheapest return flights from Lisbon to Keflavik in December from 181€

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 easyJet
05 Dec - 08 Dec Fly Play direct
01 Dec - 07 Dec easyJet
22 Dec - 02 Jan Fly Play direct
21 Dec - 26 Dec Ryanair
18 Dec - 23 Dec Ryanair
29 Dec - 05 Jan Ryanair
28 Dec - 02 Jan TAP
29 Dec - 03 Jan Ryanair

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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