Non-rev planning often works the other way around from normal travel. Rather than picking a destination and hoping for a seat, you start with what your home airport can reach.
What Route Explorer does
Route Explorer maps the routes flown from an airport, so you can see at a glance where you could realistically get to. It is useful for spotting a hub worth connecting through, or finding somewhere new when your usual route looks full.
Where to find it
Open the 'Menu' tab and tap 'StaffTraveler Route Explorer'. On a computer, go straight to route-explorer.com.
Then come back and check the loads
Route Explorer shows you which routes exist, not how full they are. Once you have a route in mind, search for it in the app and request the loads to get your actual chances.