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

Return flights

31 Aug - 11 Sep	Ryanair
20 Aug - 26 Aug	Aer Lingus
23 Aug - 27 Aug	Icelandair	direct
27 Aug - 30 Aug	Aer Lingus
27 Aug - 01 Sep	easyJet
27 Aug - 28 Aug	easyJet
20 Aug - 24 Aug	Ryanair
21 Aug - 26 Aug	Ryanair
21 Aug - 27 Aug	Ryanair
28 Aug - 31 Aug	easyJet
21 Aug - 27 Aug	Icelandair	direct
21 Aug - 26 Aug	Icelandair	direct
29 Aug - 06 Sep	Ryanair
20 Aug - 01 Sep	Lufthansa
27 Aug - 01 Sep	Icelandair	direct
22 Aug - 01 Sep	Lufthansa
21 Aug - 01 Sep	Lufthansa
29 Aug - 06 Sep	Icelandair	direct
21 Aug - 01 Sep	Icelandair	direct
20 Aug - 01 Sep	Icelandair	direct

Also check the deals for one-way flights from Glasgow to Keflavik in August.

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 August from 258€

Return flights