AirHint found the following cheapest return flights from Cardiff (CWL) to Belfast (BHD) in August 2026 (see full year).
Return flights
| 22 Aug - 23 Aug | Aer Lingus | direct | |
| 21 Aug - 24 Aug | Aer Lingus | direct | |
| 28 Aug - 31 Aug | Aer Lingus | direct | |
| 21 Aug - 23 Aug | Aer Lingus | direct |
Also check the deals for one-way flights from Cardiff to Belfast in August.
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