Cheapest return flights from Lisbon to Keflavik in May from $189

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

13 May - 20 May Ryanair
06 May - 13 May Ryanair
16 May - 19 May Fly Play direct
12 May - 19 May Ryanair
07 May - 14 May Ryanair
14 May - 21 May Ryanair
18 May - 25 May TAP
10 May - 17 May Ryanair
21 May - 28 May Air Europa
10 May - 14 May TAP
28 May - 04 Jun easyJet
27 May - 03 Jun easyJet
29 May - 05 Jun Ryanair
28 May - 08 Jun Ryanair
30 May - 09 Jun Fly Play direct
25 May - 01 Jun Air Europa
29 May - 01 Jun Ryanair
31 May - 07 Jun Ryanair
26 May - 02 Jun Fly Play direct
30 May - 06 Jun Vueling Airlines

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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