There are a number of ways to get to Orkney .....
Driving and then taking a ferry from Gills Bay, Scrabster or Aberdeen
Flying into Kirkwall from Inverness, Aberdeen, Edinburgh or Glasgow (connecting flights available)
Train up to Thurso or Wick then catch a bus to the ferry
The Orkney Bus leaves from Inverness Bus Station during the summer and takes you to the pedestrian ferry at John o' Groats across the Pentland Firth where you are met by a coach which takes you to Kirkwall
Clicking on the headings will take you direct to the relevant website