Nope. They are very close though. You have a few options. You can take the DHS bus, then either walk or boat from there to BW. Or, you can exit Epcot through the International Gateway and walk, or take the boat.
Or, you can get a cab for under $10 one way.
There are no buses from either DHS or Epcot to BW...it's going to be on foot or by boat.