Well...IF this merger goes through(and it's certainly looking more and more like it will)...MHT will FINALLY have AA service,...FINALLY !
Two routes AA Must fly out of a (hypothetical) MHT would be...MHT/JFK (most likely either A/E or a US E-jet). The NEXT should be..MHT/MIA.
I'm not positive they would fly MHT/DFW, but they should since DFW will divert a lot of east coast flyers, with western destinations, away from PHX. Now as for ORD, well WN is solid to MDW, and UA is strong MHT/ORD !