Belfast which is found inIreland in the North generally has a higher cost of living than the rest of Ireland. All the more reason the advice is to be careful with public transport, which often take away money that could be saved with simple cards or low cost packages.
La Translink is the company that manages all the networks of public transport of Belfast and just making a card with this socirtà you will save a bit. As for the Metro, the advice is to use rechargeable cards like the Smartlink or day tickets which cost around £ 3.50.
Alternatively there is always the bike, convenient and economical, then the bike sharing always goes strong.