SWA would be a much better fit, UAL second and some random combo of 1-2 of NK F9 etc third. Fourth would be a (highly unlikely IMO) fragmentation and fifth would be Hawaiian. I haven't looked in a while but back when DL/HI merger talk was going around their debt was so high there was no chance of it happening. If DL didn't want to shoulder high debt for some low yield capacity and 1 or 2 HND slots (at the time) I doubt JB or even the venture caps would be interested.