If her body is indeed found, it would end an exhaustive four-year search on the Caribbean island where the 18-year-old disappeared while on a graduation trip with classmates.
The officer accompanying the dog reportedly told the airline employee that they were going to retrieve what were believed to be Holloway's remains.
"They think they've found where Natalee Holloway's remains are, and they're taking the dog down there to confirm that," the flight attendant told the paper. "They're not telling anybody because Aruba's trying to keep this quiet."
No trace of Holloway has ever been found, despite extensive searches involving hundreds of volunteers, soldiers, FBI agents and even Dutch F-16 jets with special equipment.