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

Return flights

21 Apr - 29 Apr	easyJet
08 Apr - 15 Apr	easyJet
16 Apr - 21 Apr	easyJet
17 Apr - 24 Apr	easyJet
16 Apr - 23 Apr	easyJet
17 Apr - 21 Apr	easyJet
26 Apr - 07 May	easyJet
20 Apr - 27 Apr	easyJet
29 Apr - 10 May	easyJet
09 Apr - 16 Apr	TAP
19 Apr - 23 Apr	easyJet
19 Apr - 26 Apr	easyJet
30 Apr - 10 May	easyJet
30 Apr - 07 May	easyJet
26 Apr - 03 May	easyJet
24 Apr - 02 May	easyJet
18 Apr - 01 May	easyJet
30 Apr - 10 May	Icelandair	direct
30 Apr - 07 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 236€

Return flights