AirHint found the following cheapest return flights from Glasgow (GLA) to Keflavik (KEF) in December 2025 (see full year).

Return flights

05 Dec - 10 Dec	Icelandair	direct
12 Dec - 15 Dec	Icelandair	direct
10 Dec - 13 Dec	Icelandair	direct
05 Dec - 08 Dec	Icelandair	direct
05 Dec - 07 Dec	Icelandair	direct
11 Dec - 14 Dec	Icelandair	direct
08 Dec - 12 Dec	easyJet
15 Dec - 19 Dec	easyJet
21 Dec - 24 Dec	easyJet
22 Dec - 26 Dec	easyJet
29 Dec - 01 Jan	easyJet
27 Dec - 04 Jan	Icelandair	direct
27 Dec - 03 Jan	easyJet

Also check the deals for one-way flights from Glasgow to Keflavik in December.

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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Cheapest return flights from Glasgow to Keflavik in December from 149€

Return flights