AirHint found the following cheapest one-way flights from Cardiff (CWL) to Belfast (BHD) in July 2025 (see full year).

One-Way flights

29 Jul	Aer Lingus	direct
02 Jul	Aer Lingus	direct
26 Jul	Aer Lingus	direct
23 Jul	Aer Lingus	direct
22 Jul	Aer Lingus	direct
08 Jul	Aer Lingus	direct
09 Jul	Aer Lingus	direct
07 Jul	Aer Lingus	direct
15 Jul	Aer Lingus	direct
20 Jul	Aer Lingus	direct

Also check the deals for return flights from Cardiff to Belfast in July.

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 one-way flights from Cardiff to Belfast in July from $77

One-Way flights