AirHint found the following cheapest one-way flights from Lisbon (LIS) to Keflavik (KEF) in September 2026 (see full year).
One-Way flights
| 12 Sep | easyJet | ||
| 17 Sep | easyJet | ||
| 15 Sep | Ryanair | ||
| 22 Sep | easyJet | ||
| 14 Sep | Transavia France | ||
| 18 Sep | Ryanair | ||
| 11 Sep | Ryanair | ||
| 20 Sep | Ryanair | ||
| 13 Sep | Wizz Air | ||
| 13 Sep | TAP | direct |
Also check the deals for return flights from Lisbon to Keflavik in September.
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