Suffolk County police said the loaded handgun was found in Vonda Collier’s luggage during a routine security check Sunday.
A Transportation Security Administration agent discovered the weapon in Collier’s bag at about 7:30 a.m.
Collier, an enlisted Army solider on leave, was located in the terminal and taken into custody. She was charged with second-degree criminal possession of a weapon. The handgun was seized and will be processed for operability and ownership verification, police said.
Collier, 38, of San Antonio, had checked her baggage prior to a Southwest Airlines flight to Texas. She is being held overnight and will be arraigned Monday and First District Court in Central Islip.