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

Return flights

13 Dec - 18 Dec	easyJet
05 Dec - 09 Dec	easyJet
09 Dec - 13 Dec	easyJet
06 Dec - 10 Dec	easyJet
13 Dec - 16 Dec	easyJet
15 Dec - 16 Dec	easyJet
13 Dec - 15 Dec	easyJet
01 Dec - 05 Dec	easyJet
14 Dec - 18 Dec	easyJet
10 Dec - 16 Dec	easyJet
30 Dec - 01 Jan	easyJet
31 Dec - 04 Jan	easyJet
26 Dec - 02 Jan	Icelandair	direct
27 Dec - 01 Jan	easyJet
29 Dec - 02 Jan	easyJet
28 Dec - 08 Jan	British Airways
27 Dec - 02 Jan	easyJet
27 Dec - 04 Jan	easyJet
28 Dec - 01 Jan	Icelandair	direct
28 Dec - 08 Jan	Icelandair	direct

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 129€

Return flights