Cheapest return flights from Cardiff to Belfast in September from $133

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

Return flights

22 Sep - 24 Sep Aer Lingus direct
13 Sep - 15 Sep Aer Lingus direct
20 Sep - 23 Sep Aer Lingus direct
08 Sep - 11 Sep Aer Lingus direct
09 Sep - 11 Sep Aer Lingus direct
16 Sep - 18 Sep Aer Lingus direct
29 Sep - 01 Oct Aer Lingus direct
16 Sep - 21 Sep Aer Lingus direct
19 Sep - 21 Sep Aer Lingus direct
13 Sep - 14 Sep Aer Lingus direct
14 Sep - 15 Sep Aer Lingus direct

Also check the deals for one-way 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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