UVF and ANU, as well as being tiny places relatively, are very much seasonal destinations ie the resorts more or less close down in the Summer.
Given the sizes of these places, MAN does very well indeed to get flights to these beautiful islands, perhaps only two or three places in the whole Europe can boast regular flights here.
[And as a plea..... can the train botherers please think twice about posting nonsense about trams, trains and rail timetables. You know what happened last time. I'm sure there are very good train fora to cater for your needs.]