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

Return flights

17 Jan - 24 Jan	easyJet
11 Jan - 17 Jan	easyJet
28 Jan - 04 Feb	easyJet
16 Jan - 23 Jan	Fly Play	direct
19 Jan - 26 Jan	Fly Play	direct
23 Jan - 30 Jan	Fly Play	direct
12 Jan - 19 Jan	Fly Play	direct
09 Jan - 16 Jan	Fly Play	direct
09 Jan - 12 Jan	Fly Play	direct
26 Jan - 02 Feb	Fly Play	direct
15 Jan - 22 Jan	easyJet
10 Jan - 17 Jan	easyJet
25 Jan - 01 Feb	easyJet
30 Jan - 06 Feb	Fly Play	direct
29 Jan - 05 Feb	Lufthansa
27 Jan - 03 Feb	easyJet
25 Jan - 01 Feb	Icelandair	direct
29 Jan - 05 Feb	Icelandair	direct
31 Jan - 07 Feb	Ryanair

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

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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Cheapest return flights from Lisbon to Keflavik in January from 152€

Return flights