Cheapest return flights from Lisbon to Keflavik in May from $249

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

Return flights

06 May - 13 May easyJet
16 May - 17 May TAP
16 May - 16 May easyJet
21 May - 31 May easyJet
22 May - 01 Jun Scandinavian Airlines
17 May - 17 May TAP

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

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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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