Cheapest return flights from Keflavik to Lisbon in August from $349

AirHint found the following cheapest return flights from Keflavik (KEF) to Lisbon (LIS) in August 2026 (see full year).

Return flights

23 Aug - 30 Aug KLM
27 Aug - 03 Sep KLM
24 Aug - 31 Aug Scandinavian Airlines
26 Aug - 02 Sep Scandinavian Airlines
29 Aug - 05 Sep Scandinavian Airlines
09 Aug - 16 Aug KLM
12 Aug - 19 Aug KLM
20 Aug - 27 Aug KLM
30 Aug - 06 Sep KLM
25 Aug - 01 Sep Scandinavian Airlines
22 Aug - 29 Aug Scandinavian Airlines
21 Aug - 28 Aug Scandinavian Airlines
04 Aug - 11 Aug Scandinavian Airlines
19 Aug - 26 Aug Wizz Air
28 Aug - 04 Sep Scandinavian Airlines
31 Aug - 07 Sep Scandinavian Airlines
17 Aug - 24 Aug Scandinavian Airlines
26 Aug - 16 Sep Vueling Airlines
27 Aug - 03 Sep Icelandair direct
26 Aug - 09 Sep Vueling Airlines

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

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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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