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

Return flights

13 Dec - 15 Dec	KLM	direct
02 Dec - 05 Dec	KLM	direct
08 Dec - 12 Dec	KLM	direct
29 Dec - 02 Jan	KLM	direct
24 Dec - 27 Dec	KLM	direct
27 Dec - 30 Dec	KLM	direct
04 Dec - 07 Dec	KLM	direct
14 Dec - 17 Dec	KLM	direct
30 Dec - 02 Jan	KLM	direct
11 Dec - 14 Dec	KLM	direct
05 Dec - 08 Dec	KLM	direct
25 Dec - 27 Dec	KLM	direct
31 Dec - 03 Jan	KLM	direct
27 Dec - 10 Jan	KLM	direct
27 Dec - 02 Jan	KLM	direct
19 Dec - 04 Jan	KLM	direct
28 Dec - 04 Jan	KLM	direct
20 Dec - 04 Jan	KLM	direct
31 Dec - 01 Jan	KLM	direct

Also check the deals for one-way flights from Cardiff to Amsterdam 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 Amsterdam in December from 168€

Return flights