A freeware program you might find useful is Destination Finder - destfn20.zip. You input any ICAO code you like and, optionally, specify details of the sort of flight you are looking for. The program then finds all destinations which approximate to your requirements. You can specify many details but, if you just input the ICAO code, you get a list of all surrounding destinations together with a full description of each. You then select your destination, note down the details, start FS and input your flightplan.