Margaret Lee flew from Tennessee to Amsterdam to meet someone she had been chatting with online.
The 16-year-old was arrested by Dutch police in the city of Zwolle over the weekend on suspicion of identity theft.
Police say she used her sister's passport to leave the country after hers was confiscated by her family.
Ms Lee ran away from her home in Clarksville on 1 April, according to the Montgomery County Sheriffs office.
She then flew to Amsterdam, via Iceland, by herself.