AirHint found the following cheapest one-way flights from Lisbon (LIS) to Keflavik (KEF) in December 2025 (see full year).
One-Way flights
| 15 Dec | easyJet | ||
| 17 Dec | Ryanair | ||
| 16 Dec | Ryanair | ||
| 24 Dec | Ryanair | ||
| 18 Dec | easyJet | ||
| 31 Dec | Ryanair | ||
| 23 Dec | Ryanair | ||
| 30 Dec | Wizz Air | ||
| 20 Dec | Ryanair | ||
| 28 Dec | Ryanair |
Also check the deals for return flights from Lisbon to Keflavik in December.
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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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