A cleaning crew found the "pyrotechnic device" after the flight had landed and emptied its passengers on Sunday evening .
The domestic flight had arrived at New York City's LaGuardia Airport from Baltimore, Maryland.
Police were informed and the device was traced back to Thomas Ouellette, 67, from Bonita Springs, Florida who was waiting for a connecting flight to Fort Myers.
Special Agent Richard Kolko of the FBI's New York Field Office told CNN
that the man had been questioned and released.
The device has been seized by police and entered into evidence.
Ouellette was issued a federal summons to appear in court although a date has yet to be set.
There has been no further elaboration on what the device might have consisted of or what danger it may have posed to the public as of yet.
The Transportation Safety Administration is set to conduct a thorough review of the incident.
There is some speculation the device may have been a firecracker although the intentions of the man remain unclear.
The incident comes at a time of heightened security days after a Nigerian man attempted to ignite explosives on a Detroit-bound plane. The makeshift detonator failed to work and the man was tackled and arrested.
Earlier today, as Al-Qaeda linked group claimed responsibility for the attempted attack.