Post Office – Castlederg, Killen – Opening Hours & Branch Details Visit your local Post Office branch at 3 Main Street, about a 2.94 mile drive south-west of the centre of Castlederg. The branch is a convenient addition to the locales of Learmore, Shanog, Killen Near, Killen Far, Edenreagh, Ganvaghan Hemphill, Lisleen and Munie. Opening hours are from 9:00 am – 5:30 pm today (Friday). Refer to this page for information on Post Office Castlederg, Killen, including the operating times, branch address, telephone details and more.