AirHint found the following cheapest return flights from Cardiff (CWL) to Belfast (BHD) in March 2026 (see full year).

Return flights

19 Mar - 23 Mar	Aer Lingus	direct
02 Mar - 05 Mar	Aer Lingus	direct
20 Mar - 22 Mar	Aer Lingus	direct
03 Mar - 10 Mar	KLM
06 Mar - 08 Mar	KLM
07 Mar - 08 Mar	Aer Lingus	direct
06 Mar - 08 Mar	Aer Lingus	direct

Also check the deals for one-way flights from Cardiff to Belfast in March.

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 return flights from Cardiff to Belfast in March from 103€

Return flights