Cheapest one-way flights from Cardiff to Belfast in December from $64

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

One-Way flights

16 Dec Aer Lingus direct
03 Dec Aer Lingus direct
06 Dec Aer Lingus direct
01 Dec Aer Lingus direct
13 Dec Aer Lingus direct
24 Dec Aer Lingus direct
22 Dec Aer Lingus direct
20 Dec Aer Lingus direct
27 Dec Aer Lingus direct

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

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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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