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

Return flights

28 Aug - 29 Aug	Ryanair
14 Aug - 16 Aug	Ryanair
18 Aug - 22 Aug	Ryanair
24 Aug - 27 Aug	Ryanair
14 Aug - 17 Aug	Ryanair
05 Aug - 07 Aug	Ryanair
30 Aug - 31 Aug	Ryanair
25 Aug - 28 Aug	KLM	direct
25 Aug - 30 Aug	KLM	direct
21 Aug - 08 Sep	Ryanair
14 Aug - 18 Aug	KLM	direct
31 Aug - 02 Sep	Ryanair
23 Aug - 08 Sep	Ryanair
23 Aug - 08 Sep	KLM	direct
30 Aug - 01 Sep	KLM	direct
21 Aug - 08 Sep	KLM	direct
31 Aug - 02 Sep	KLM	direct

Also check the deals for one-way flights from Cardiff to Amsterdam 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 Cardiff to Amsterdam in August from $179

Return flights