LNIDA: There are currently no scheduled flights between Aberdeen and the Central Belt or between Inverness and the Central Belt. There used to be flights on these routes but they couldn't compete with surface transportation after rail services and roads were improved and APD steadily increased.
There are still flights between the central belt and Wick, Kirkwall, Sumburgh, Stornoway and many smaller islands. The services to the smaller islands currently operate from Glasgow and from Oban.
There are also inter-island services in Orkney and Shetland, in the Hebrides and between Fair Isle and Shetland.