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

Return flights

23 Apr - 26 Apr	easyJet
18 Apr - 21 Apr	easyJet
14 Apr - 21 Apr	Scandinavian Airlines
23 Apr - 29 Apr	easyJet
13 Apr - 20 Apr	easyJet
23 Apr - 10 May	easyJet
22 Apr - 29 Apr	easyJet
15 Apr - 22 Apr	easyJet
16 Apr - 20 Apr	easyJet
21 Apr - 28 Apr	easyJet
18 Apr - 25 Apr	easyJet
27 Apr - 04 May	Scandinavian Airlines
28 Apr - 05 May	Scandinavian Airlines
29 Apr - 06 May	easyJet
19 Apr - 03 May	easyJet
18 Apr - 02 May	easyJet
25 Apr - 02 May	easyJet
23 Apr - 09 May	easyJet
26 Apr - 03 May	easyJet
30 Apr - 03 May	easyJet

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

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 April from 171€

Return flights