US pastor Andrew Brunson has left turkey after more than two years in detention.
He will meet with President Donald Trump at the White House on Saturday.
The case had caused a bitter diplomatic rift between Washington DC and Ankara.
Brunson was arrested over alleged links to political groups, including the banned Gulenist movement.
A Turkish court had sentenced Mr. Brunson to three years in jail - but freed him because of the time he had already spent in detention.
US media reported on Thursday that the US had struck a secret deal with Turkey to lift sanctions in order to secure his release. President Trump denied on Twitter that any deal had been made.