The only direct bus runs are to the theme parks, waterparks and Downtown Disney. To get to another resort. You need to take a bus to one those places and then switch to another transport that takes you to the particular resort. Generally, the fastest way by Disney transport is to take the bus to the particular park that is nearest the resort you are going to. From MK you can get to Cont, Poly or GF by monorail, and WL and FW by boat. To get to YC/BC, Swan/Dolphin, or BW, the fastest way is the bus to MGM and then switch to the boat from there that goes to those resorts (or you can actually walk from MGM to those resorts--about 20 to 25 minutes). The slowest way is the Downtown Disney connection but the later it gets in the evening, the more that one becomes your only choice as the theme parks close and transportation to them ends. The Downtown Disney route runs till about 2 a.m. None of these trips is efficient as it can often take an hour or more to get to another resort. Best is to either have a car or take a cab (readily available at the resorts) as by car or cab you can essentially get to anywhere in WDW in 10 to 20 minutes.