Bulger, 85, was removed from prison in Tucson, Ariz., on August 29, a Florida Bureau of Prisons spokesman said. After a layover in Oklahoma, Bulger arrived at the Coleman United States Penitentiary in Sumterville, Fla., on Wednesday.
The spokesman would not say why Bulger was relocated.
Bulger was the head of the Boston-area Winter Hill gang and an FBI informant. He fled Boston in 1995 and avoided capture for 16 years, until he was finally captured living in Santa Monica, Calif., in 2011.
He was found guilty in August of taking part in 11 murders and criminal racketeering and was sentenced to two consecutive life sentences.