The spawn point does not have anything to do with successfully landing.
What matters is your distance from the nearest enemy. If you are in enemy territory and wish to land successfully without giving away a proxy or a kill then you need to be better than 5k+ away from the nearest enemy.
You will know this happens when you look at your "End Sortie" and it is Green. As an FYI, even if you do not see an enemy plane, Enemy Dar, or a GV Dar, doesn't mean that somebody isn't within 5k of you. There could be somebody in a manned gun, low level etc. and nothing will show on the map except that you will have a Red "End Sortie". The "End Sortie" light is what counts.
If within your territory the "End Sortie" will either be Green or Yellow. If there are enemy within your territory and closer than 5K then you will see a Yellow "End Sortie" which will allow for a successful ditch provided you were not hit and damaged. You must return to your base and get on Concrete, Pavement, or bitumen to successfully land otherwise.