It’s hard to say how this will apply to global not knowing how global will look in terms of the map & mini map
But assuming it stays the same/similar how about a feature that gives an option to put a “box” around our current map. This way when planning a flight you could get a rough idea how long the flight will be based on the box which would be the “size” of a current region. Of course you could fly out of the box, it’s just lines on the map.
I know what I’m thinking, just doesn’t come out very well here but hopefully someone gets the idea.