Cheapest one-way flights from Cardiff to Belfast in September from $57

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

One-Way flights

20 Sep Aer Lingus direct
09 Sep Aer Lingus direct
10 Sep Aer Lingus direct
16 Sep Aer Lingus direct
23 Sep Aer Lingus direct
15 Sep Aer Lingus direct
06 Sep Aer Lingus direct
07 Sep Aer Lingus direct
14 Sep Aer Lingus direct
05 Sep Aer Lingus direct

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

Skyscanner

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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