Cheapest return flights from Lisbon to Keflavik in May from 254€

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

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

Return flights

30 May - 02 Jun Fly Play direct
22 May - 29 May Lufthansa
28 May - 08 Jun Ryanair
18 May - 20 May Ryanair
22 May - 30 May Lufthansa
20 May - 27 May Lufthansa
23 May - 30 May Fly Play
20 May - 29 May Ryanair
23 May - 31 May Fly Play
29 May - 02 Jun Eurowings
19 May - 26 May Ryanair
21 May - 28 May Wizz Air
30 May - 06 Jun easyJet
17 May - 24 May TAP
29 May - 05 Jun Austrian Airlines
29 May - 05 Jun TAP direct
30 May - 06 Jun Fly Play direct

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