There are three monorail lines,Magic Kingdom express monorail that only stops at the Transportation Ticket Center(TTC) and at MK,the second is the resort monorail that stops at the Polynesian resort,Grand Floridian resort,Contemporary resort,the TTC and MK.The third is the Epcot line that only goes back and forth between the TTC to Epcot,so if you're coming from Epcot you would have to transfer to the MK express monorail or resort monorail,or if you wanted you could also take the ferry over to MK from the TTC,but that probably will take longer,I usually only take the ferry after MK closes when the mob of people is getting out.