He did stay in Greece three months, Acts 20:3, but it is believed some things hindered him, that he did not winter at Corinth. It was the custom for some members of the gospel churches, to accompany the apostles some part of their way when they went from them to any other places, in token of their kindness and respect to them, Acts 15:3, Acts 17:15 20:38.
Related Commentaries of 1 Corinthians 16:6
1 Corinthians 16:6
6 And it may be that I will abide, yea, and winter with you, that ye may bring me on my journey whithersoever I go.