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

Return flights

08 Dec - 10 Dec	Ryanair
15 Dec - 17 Dec	Ryanair
30 Dec - 05 Jan	Ryanair
14 Dec - 17 Dec	Ryanair
20 Dec - 26 Dec	Ryanair
26 Dec - 30 Dec	Ryanair
17 Dec - 18 Dec	Ryanair
23 Dec - 01 Jan	Ryanair
17 Dec - 19 Dec	Ryanair
28 Dec - 30 Dec	Ryanair
27 Dec - 28 Dec	Ryanair
04 Dec - 05 Dec	Aer Lingus
30 Dec - 06 Jan	Ryanair

Also check the deals for one-way flights from Cardiff to Glasgow 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 Cardiff to Glasgow in December from $96

Return flights