AirHint found the following cheapest return flights from Keflavik (KEF) to Lisbon (LIS) in June 2026 (see full year).
Return flights
| 11 Jun - 18 Jun | KLM | ||
| 16 Jun - 21 Jun | Transavia France | ||
| 08 Jun - 16 Jun | KLM | ||
| 30 Jun - 04 Jul | Transavia France | ||
| 28 Jun - 02 Jul | Scandinavian Airlines |
Also check the deals for one-way flights from Keflavik to Lisbon in June.
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