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

Return flights

20 Apr - 29 Apr	easyJet
21 Apr - 28 Apr	easyJet
25 Apr - 03 May	easyJet
23 Apr - 03 May	easyJet
02 Apr - 16 Apr	easyJet
15 Apr - 30 Apr	Scandinavian Airlines
01 Apr - 08 Apr	easyJet
07 Apr - 13 Apr	easyJet
02 Apr - 09 Apr	Scandinavian Airlines
30 Apr - 03 May	easyJet
05 Apr - 09 Apr	transavia
21 Apr - 30 Apr	Ryanair
23 Apr - 30 Apr	Lufthansa
30 Apr - 03 May	Icelandair	direct
23 Apr - 03 May	Icelandair	direct

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 237€

Return flights