AirHint found the following cheapest return flights from Lisbon (LIS) to Keflavik (KEF) in July 2026 (see full year).
Return flights
| 16 Jul - 23 Jul | Icelandair | direct | |
| 29 Jul - 06 Aug | KLM | ||
| 21 Jul - 27 Jul | Ryanair | ||
| 30 Jul - 02 Aug | Icelandair | direct | |
| 19 Jul - 25 Jul | TAP | ||
| 11 Jul - 17 Jul | TAP |
Also check the deals for one-way flights from Lisbon to Keflavik in July.
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