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

Return flights

01 Dec - 13 Dec	easyJet
08 Dec - 12 Dec	easyJet
04 Dec - 07 Dec	Icelandair	direct
03 Dec - 07 Dec	Icelandair	direct
05 Dec - 10 Dec	Icelandair	direct
10 Dec - 14 Dec	Icelandair	direct
02 Dec - 08 Dec	easyJet
06 Dec - 08 Dec	easyJet
06 Dec - 07 Dec	Icelandair	direct
05 Dec - 07 Dec	Icelandair	direct
16 Dec - 01 Jan	easyJet
26 Dec - 02 Jan	Icelandair	direct
16 Dec - 01 Jan	Icelandair	direct
31 Dec - 04 Jan	easyJet
19 Dec - 01 Jan	easyJet
26 Dec - 01 Jan	Icelandair	direct
19 Dec - 01 Jan	Icelandair	direct
30 Dec - 05 Jan	easyJet
27 Dec - 08 Jan	easyJet
31 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 $162

Return flights