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

Return flights

28 Jan - 04 Feb	Ryanair
17 Jan - 21 Jan	Ryanair
26 Jan - 02 Feb	Ryanair
26 Jan - 03 Feb	easyJet
24 Jan - 01 Feb	Ryanair
21 Jan - 28 Jan	Ryanair
13 Jan - 21 Jan	Ryanair
19 Jan - 28 Jan	Ryanair
12 Jan - 16 Jan	Ryanair
31 Jan - 05 Feb	Ryanair
30 Jan - 05 Feb	Ryanair
29 Jan - 03 Feb	Ryanair
21 Jan - 30 Jan	Ryanair
30 Jan - 04 Feb	easyJet
20 Jan - 23 Jan	Ryanair
27 Jan - 31 Jan	Ryanair
29 Jan - 05 Feb	Ryanair
20 Jan - 24 Jan	Ryanair
14 Jan - 20 Jan	Ryanair
31 Jan - 08 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 185€

Return flights