AirHint found the following cheapest return flights from Lisbon (LIS) to Keflavik (KEF) in August 2026 (see full year).
Return flights
| 21 Aug - 28 Aug | Scandinavian Airlines | ||
| 01 Aug - 12 Aug | easyJet | ||
| 31 Aug - 09 Sep | Ryanair | ||
| 02 Aug - 13 Aug | Icelandair | direct |
Also check the deals for one-way flights from Lisbon to Keflavik in August.
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