A teen from Nogales, Sonora, Mexico, faces 16 months in prison, followed by five years of supervised release.
She was identified as 19-year-old Dulce Maria Haros.
Haros pleaded guilty to possession with intent to distribute fentanyl on March 7, 2023.
On Oct. 1, 2022, Haros was on a shuttle that stopped at a United States Border Patrol checkpoint.
Agents found a handbag containing three packages of fentanyl pills weighing a total of 3 kilograms during a routine inspection.
Haros admitted that the handbag belonged to her and that she planned to give the fentanyl to someone else.