Originally Posted by
mersk862
As mergers have happened, you see a bit more of that type of overlapping since airlines aren't re-registering planes like they had done in some previous mergers. (Southwest is really the exception to this, as it's re-registered all the FL planes).
I wonder why this is? The cost to register an airplane is $5... no matter if you are registering a Cessna 172 or a Boeing 747.