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

Return flights

10 Dec - 13 Dec	Icelandair	direct
07 Dec - 10 Dec	Icelandair	direct
10 Dec - 14 Dec	Icelandair	direct
05 Dec - 10 Dec	Icelandair	direct
05 Dec - 12 Dec	Icelandair	direct
15 Dec - 18 Dec	Icelandair	direct
11 Dec - 13 Dec	Icelandair	direct
31 Dec - 07 Jan	easyJet
08 Dec - 11 Dec	easyJet
01 Dec - 04 Dec	easyJet
01 Dec - 05 Dec	easyJet
31 Dec - 04 Jan	easyJet
27 Dec - 02 Jan	Icelandair	direct
27 Dec - 01 Jan	Icelandair	direct
30 Dec - 04 Jan	easyJet
29 Dec - 04 Jan	easyJet
28 Dec - 02 Jan	Icelandair	direct
29 Dec - 02 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 146€

Return flights