Delta asks comair to cnx flights so they can get slots from them too. Lets compare some numbers.
From the DOT website for freedom specifically sorted for JFK for JAN and FEB.
CNX - 14.1%
ontime - 53%
air carrier delay - 16%
Comair's sorted for JFK
CNX - 6.78%
ontime - 65%
air carrier delay - 8%
Don't try to tell me they asked freedom to cnx any more flights than they asked comair to.
source
http://www.transtats.bts.gov/OT_Dela...ause1.asp?pn=1