Post Office – Isle Of Mull, Aros – Opening Hours & Branch Details Post Office is proud to be located on Aros, approximately a 5.80 mile distance north of the centre of Isle Of Mull (nearby Loch Sunart To The Sound of Jura Marine Protected Area). The branch is an important addition to the areas of Killichronan, Ardnacross, Salen, Aros Mains, Aros, Pennygown, Gruline and Fiunary. Doors are open today (Friday) from 8:30 am until 7:00 pm, for those who’d like to stop by. On this page, you may find open hours, address details, customer rating and more information about Post Office Isle Of Mull, Aros.