Post Office – Isle Of Colonsay, Colonsay (Isle Of) – Opening Hours & Branch Details Post Office is easily accessible on Scalasaig, about 1.17 miles south-east of the centre of Isle Of Colonsay (near to Kilchattan Primary School). The branch principally provides service to customers from the areas of Kiloran, Scalasaig, Kilchattan, Aridhglas, Reasagbuie and Upper Kilchattan. Today’s (Friday) opening times are 9:00 am until 5:30 pm. On this page you’ll find all the information about Post Office Isle Of Colonsay, Colonsay (Isle Of), including the operating hours, local map, email contact or other beneficial info.