Fantastic info, crazyMRer (and hello, neighbor!). I hadn't considered/ thought the outbound flights/day would be a good way to select.

How is LGA as a hub? I haven't flown there much at all and think this would be an important aspect.

"New" AA also flies into DCA 3x/ day... although I always seem to get stuck going through PHL which is a terrible airport IMHO.

So going to their sites, I see AA/US has 9 flights/day from MHT (Charlotte, DC and Phila), Delta has 10 flights (Atlanta, LGA and DTW).

I think I'll head off and try Delta for a while... Thanks.