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

Return flights

21 Jan - 28 Jan	easyJet
21 Jan - 30 Jan	easyJet
27 Jan - 03 Feb	easyJet
21 Jan - 29 Jan	easyJet
26 Jan - 11 Feb	easyJet
19 Jan - 28 Jan	easyJet
16 Jan - 23 Jan	easyJet
26 Jan - 30 Jan	easyJet
19 Jan - 23 Jan	easyJet
16 Jan - 18 Jan	easyJet
20 Jan - 28 Jan	easyJet
28 Jan - 30 Jan	easyJet
29 Jan - 05 Feb	easyJet
28 Jan - 04 Feb	easyJet
28 Jan - 03 Feb	Ryanair
29 Jan - 01 Feb	Ryanair
23 Jan - 01 Feb	easyJet
24 Jan - 01 Feb	Ryanair
25 Jan - 01 Feb	easyJet
25 Jan - 01 Feb	Icelandair	direct

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Lisbon to Keflavik in January from 143€

Return flights