Post Office – Castlederg, Killeter – Opening Hours & Branch Details Post Office sits at 17 Main Street, approximately a 4.60 mile drive south-west from the centre of Castlederg. This branch is an excellent addition to the local businesses of Speerholme, Magheranageeragh, Woodside, Glebe, Gortnagross, Killeter, Aghalougher and Scralea. Doors are open here today (Friday) from 9:00 am until 5:00 pm, for those who would like to swing by. Read the specifics on this page for Post Office Castlederg, Killeter, including the branch hours, location description, email address and further details.