Cheapest return flights from Keflavik to Lisbon in May from $263

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

16 May - 23 May Fly Play direct
09 May - 16 May Fly Play direct
05 May - 09 May Fly Play direct
12 May - 13 May Fly Play
08 May - 09 May Wizz Air Malta
29 May - 16 Jun Lufthansa
11 May - 12 May Wizz Air Malta
11 May - 18 May Fly Play
12 May - 12 May Fly Play
07 May - 08 May easyJet
30 May - 18 Jun Fly Play
09 May - 15 May Lufthansa
30 May - 17 Jun Fly Play
30 May - 12 Jun Fly Play
30 May - 16 Jun Fly Play
30 May - 16 Jun Fly Play 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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