Disney sells "Park Hopper" tickets.
So, they provide a way for guests to "Hop" between the parks.
There is "direct" transportation between all the WDW theme parks.
The frequency of departure for each is approximately every 20 minutes, give or take, all day long.
Most routes are via Disney Buses.
Here are the "park-to-park" Disney Transportation direct connections:
MK> Epcot = Monorail to TTC, Switch to 2nd Monorail to Epcot
MK> DHS = Direct Bus
MK> AK= Direct Bus
AK> DHS= Direct Bus
AK> Epcot= Direct Bus
AK> MK= Direct Bus
DHS> MK= Direct Bus
DHS> AK= Direct Bus
DHS> Epcot= Direct Bus (Epcot Front Gate) or Boat (Epcot Intl. Gateway)
......Boats ("Friendships") make 3 interim stops at the Epcot area resorts.
Epcot > MK= Monorail to TTC, Switch to 2nd Monorail to MK
Epcot > AK= Direct Bus
Epcot> DHS= Direct Bus (Epcot Front Gate) or Boat (Epcot Intl. Gateway)
......Boats ("Friendships") make 3 interim stops at the Epcot area resorts.
The buses have their destinations shown on them on illuminated signs.
The bus stops at the parks are also marked with signage.
As a rule-of-thumb, allow 40-75 minutes to get from the gates of one park to the gates of another park. The actual on-the-road time is far less than that, but you need to factor in the amount of time that it might take to wait for the next bus to arrive and load.