If it is an OW Award flight , then the information you require is all nicely provided on the AA website at
http://www.aa.com/content/disclaimer...ld_rules.jhtml
Originally Posted by aa.com
An open jaw occurs when you arrive into one city and depart from another city. Travel between the two cities may be by train/bus/separate airline ticket, etc.
It also lists airports within cities which will not count as a open jaw. For New York, the airports are :
Newark - EWR
White Plains/Westchester - HPN
John F Kennedy - JFK
LaGuardia - LGA
Islip/Long Island - ISP
Whether it counts as a segment I don't know
Dave
Dave