Paul had decided to sail past Ephesus to avoid spending time in the province of Asia, because he was in a hurry to reach Jerusalem, if possible, by the day of Pentecost.
KJV
For Paul had determined to sail by Ephesus, because he would not spend the time in Asia: for he hasted, if it were possible for him, to be at Jerusalem the day of Pentecost.
ASV
For Paul had determined to sail past Ephesus, that he might not have to spend time in Asia; for he was hastening, if it were possible for him, to be at Jerusalem the day of Pentecost.