Cheapest return flights from Lisbon to Keflavik in August from $238

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 August 2025 (see full year).

Return flights

29 Aug - 01 Sep Fly Play direct
29 Aug - 05 Sep Fly Play direct
25 Aug - 01 Sep Fly Play direct
22 Aug - 29 Aug Fly Play direct
11 Aug - 18 Aug Fly Play direct
11 Aug - 22 Aug Fly Play direct
15 Aug - 22 Aug Fly Play direct
27 Aug - 03 Sep Ryanair
04 Aug - 11 Aug Fly Play direct
30 Aug - 02 Sep Ryanair
30 Aug - 06 Sep Ryanair
20 Aug - 27 Aug Ryanair
12 Aug - 19 Aug Ryanair
08 Aug - 18 Aug Fly Play direct
16 Aug - 24 Aug easyJet
28 Aug - 04 Sep Air Europa
23 Aug - 30 Aug Ryanair
31 Aug - 07 Sep Ryanair
26 Aug - 02 Sep TAP
28 Aug - 04 Sep Icelandair direct

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

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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