A federal jury in Owensboro found Whalen guilty in July and sentenced him Monday.
The United States Attorney's Office said Whalen took a 13-year-old girl from her home in Owensboro in September of 2009.
An Amber Alert was issued in several states and the girl was found with Whalen in Wisconsin less than 24 hours later.
Investigators said Whalen drove from Maine to Daviess County, Kentucky to get the girl.
The child's mother had briefly lived with Whalen's roommate in the past.