Cheapest one-way flights from Cardiff to Belfast in December from $58

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

One-Way flights

17 Dec Aer Lingus direct
18 Dec Aer Lingus direct
24 Dec Aer Lingus direct
15 Dec Aer Lingus direct
26 Dec Aer Lingus direct
06 Dec Aer Lingus direct
04 Dec Aer Lingus direct
03 Dec Aer Lingus direct
08 Dec Ryanair
16 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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