I'm not really sure that any US airline can make HND work onward connections or not with the horrible time slots allocated. I flew the SEA/HND flight, landed at 10:30PM did not finish customs until 11:30 and tried to figure out the subway and which stop I needed to get to my hotel and by the time I had it figured out they had closed the subway! That was an expensive cab ride!

HA might be the only exception if they get KOA/HND as it would be mostly Japanese tourists who are going home and won't have the same difficulties as many Americans would have trying to figure out the Tokyo subway.