AirHint found the following cheapest one-way flights from Lisbon (LIS) to Keflavik (KEF) in September 2026 (see full year).
One-Way flights
| 19 Sep | easyJet | ||
| 20 Sep | easyJet | ||
| 26 Sep | easyJet | ||
| 06 Sep | easyJet | ||
| 18 Sep | Vueling Airlines | ||
| 24 Sep | Ryanair | ||
| 27 Sep | easyJet | ||
| 20 Sep | Icelandair | direct | |
| 24 Sep | Icelandair | direct | |
| 23 Sep | Vueling Airlines |
Also check the deals for return flights from Lisbon to Keflavik in September.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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