Post Office – Llanelli – Opening Hours & Branch Details Post Office occupies a location at 18 John Street, a 0.13 mile distance west of the centre of Llanelli (by Llanelli Queen Victoria Road). The branch serves customers from the areas of Halfway, Llanelli Town Centre, Tyshia, Morfa, Machynys, Seaside, Pemberton and Bigyn. Doors are open today (Friday) from 9:00 am until 5:30 pm. Refer to this page for the specifics on Post Office Llanelli, including the hours of operation, street address, phone number and other information.