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
09 Dec - 12 Dec	Icelandair	direct
11 Dec - 14 Dec	Icelandair	direct
01 Dec - 04 Dec	easyJet
15 Dec - 18 Dec	easyJet
18 Dec - 22 Dec	Icelandair	direct
15 Dec - 18 Dec	Icelandair	direct
17 Dec - 19 Dec	easyJet
19 Dec - 26 Dec	Icelandair	direct
18 Dec - 20 Dec	Icelandair
26 Dec - 04 Jan	Icelandair	direct
20 Dec - 04 Jan	easyJet
27 Dec - 01 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 $183

Return flights