The boy travelled in the wheel well of a flight from California to Hawaii, surviving frigid temperatures at 38,000 feet (11,500 meters) and a lack of oxygen, FBI and airline officials said.
FBI questioned the boy after he was discovered at the Maui airport with no identification.
"Kid's lucky to be alive,'' said FBI officials. Reportedly, the teenager had run away from his family after an argument.
According to FBI, a security footage from the San Jose airport showed the boy jumping a fence to get to Hawaiian Airlines Flight 45 on Sunday morning. When the flight landed in Maui, the boy came out of the wheel well and started wandering around the airport grounds.
"He was unconscious for the lion's share of the flight,'' Simon said. The flight lasted about 5 hours.
The boy was noticed by the airlines personnel on the ramp after the flight arrived. They immediately notified airport security.
"Our primary concern now is for the well-being of the boy, who is exceptionally lucky to have survived,'' Croyle said.
A medical test was conducted. "The boy is perfectly alright. He doesn't even remember the flight", said FBI officer.
The boy will not be charged and was referred to child protective services, he added.