I know you can use command + ` to switch between windows in one program in one space.
But this is only in the one space, if you have other windows from the same App in different spaces … it won't switch to that space.
Switching between windows of one application in multiple spaces
keyboardmission-controlspaceswindow-manager
Best Answer
I don't know if there is a direct shortcut for that.
An alternative would be using the application windows exposé, which shows all of a particular application's windows (across all spaces). I think the default keyboard shortcut for this is F10, but you can change it in System Preferences > Mission Control.
(You can also set up a gesture for it if you're using a trackpad.)