The nearest rail station to the King's Theatre is Haymarket, however to get to the theatre from a rail station it is easier to use Waverley Station and a local bus.
The King's Theatre is in the Tollcross area of Edinburgh. The main Lothian bus routes that serve the King's Theatre are: 10, 11, 15, 15a, 16, 23, 27, 45. To further plan your bus route please visit: https://www.lothianbuses.com/live-travel-info/journey-planner/
City Cabs also offer an excellent taxi service and are the longest serving taxi association in the city. You can book your journey online here https://www.citycabs-online.co.uk/webbookercash/ or by calling them on 0131 228 1211.