AirHint found the following cheapest return flights from Glasgow (GLA) to Keflavik (KEF) in December 2026 (see full year).
Return flights
| 03 Dec - 07 Dec | Icelandair | direct | |
| 11 Dec - 14 Dec | Icelandair | direct | |
| 26 Dec - 01 Jan | Icelandair | direct | |
| 20 Dec - 26 Dec | Icelandair | direct | |
| 19 Dec - 25 Dec | Lufthansa |
Also check the deals for one-way flights from Glasgow to Keflavik in December.
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