There is very little evidence that any of the other Enterprises where the flagship. The only one absolutely positively identified as the flagship is the Enterprise-D. The Ent-A might have been a flagship at one time for the sole reason that a Starfleet Admiral was flying it, though, but this is speculation. -- Harry 15:16, 22 Dec 2004 (CET)
I realised that when I remembered that Admiral Hayes commanded the flagship in First Contact which was destroyed.--rebelstrike2005