American is offering “52 new nonstop flights and enhanced schedules” in its 2018 schedule Only 8 are actually newly announced today. Like United, American Airlines is beefing up service to smaller markets where there’s less competition from ultra low cost carriers like Spirit and Frontier, and consequently less fare pressure.
In addition starting April 4 Chicago – New York LaGuardia is being upgraded to a ‘shuttle’ product along the lines of New York LaGuardia – DC and Boston