Cheapest return flights from Lisbon to Keflavik in August from $336

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

Return flights

25 Aug - 01 Sep Vueling Airlines
27 Aug - 03 Sep TAP
24 Aug - 31 Aug Vueling Airlines
26 Aug - 02 Sep Norwegian
29 Aug - 05 Sep easyJet
17 Aug - 24 Aug Finnair
18 Aug - 25 Aug TAP
30 Aug - 06 Sep TAP
31 Aug - 07 Sep easyJet
04 Aug - 11 Aug Aegean Airlines
19 Aug - 26 Aug Norwegian
29 Aug - 16 Sep Vueling Airlines
14 Aug - 21 Aug Air Europa
12 Aug - 19 Aug KLM
13 Aug - 20 Aug Air Europa
20 Aug - 27 Aug TAP
15 Aug - 22 Aug TAP
30 Aug - 06 Sep Icelandair direct
30 Aug - 15 Sep Iberia
27 Aug - 03 Sep Icelandair direct

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

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