Cheapest return flights from Keflavik to Lisbon in May from $251

Best time to book flights for Keflavik (KEF) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest return flights from Keflavik (KEF) to Lisbon (LIS) in May 2025 (see full year).

Return flights

19 May - 26 May Fly Play direct
11 May - 16 May Fly Play
02 May - 09 May Fly Play direct
20 May - 27 May easyJet
08 May - 16 May Lufthansa
01 May - 08 May Wizz Air Malta
09 May - 17 May Fly Play
01 May - 08 May Icelandair direct
11 May - 16 May TAP direct

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

Skyscanner

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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