Post Office – Dungannon, Garvaghey – Opening Hours & Branch Details Post Office is conveniently positioned at 232 Omagh Road, 14.83 miles west of the centre of Dungannon. This branch serves the customers of Crockmore, Brackagh, Black Hill, Cloghbane, Garvaghy, Gort, Altcloghfin and Rarogan. If you would like to swing by today (Friday), its working times are 9:00 am until 5:30 pm. On this page, you can find business times, location details, contact number and further information about Post Office Dungannon, Garvaghey.