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

Return flights

08 Dec - 13 Dec	Icelandair	direct
09 Dec - 12 Dec	easyJet
01 Dec - 05 Dec	easyJet
01 Dec - 06 Dec	easyJet
09 Dec - 12 Dec	Icelandair	direct
08 Dec - 12 Dec	Icelandair	direct
03 Dec - 08 Dec	Icelandair	direct
05 Dec - 09 Dec	Icelandair	direct
04 Dec - 07 Dec	Icelandair	direct
11 Dec - 14 Dec	Icelandair	direct
20 Dec - 05 Jan	easyJet
26 Dec - 02 Jan	Icelandair	direct
21 Dec - 06 Jan	easyJet
26 Dec - 01 Jan	Icelandair	direct
28 Dec - 01 Jan	easyJet
21 Dec - 06 Jan	Icelandair	direct
31 Dec - 03 Jan	easyJet
30 Dec - 06 Jan	easyJet
27 Dec - 04 Jan	Icelandair	direct
28 Dec - 08 Jan	KLM

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 122€

Return flights