Landed at Caesarea,
He went up
He greeted the church.
Then he went down
καὶ κατελθὼν εἰς Καισάριαν, ἀναβὰς καὶ ἀσπασάμενος τὴν ἐκκλησίαν, κατέβη εἰς Ἀντιόχειαν,
The author of Acts indicated that when Paul landed (καὶ κατελθὼν) at Caesarea (εἰς Καισάριαν), he went up (ἀναβὰς) to Jerusalem. He greeted (καὶ ἀσπασάμενος) the church (τὴν ἐκκλησίαν). Then he went down (κατέβη) to Antioch (εἰς Ἀντιόχειαν). This sailing from Ephesus to Caesarea was a long distance, about 600 miles, but it was closer to Jerusalem than Antioch, about 50 miles. He then went to Jerusalem and then finally from Jerusalem to Antioch, about 300 miles on foot, quite a distance. Did the greeting in Jerusalem indicate some Jewish or Christian festival? Actually, there was no particular Jerusalem Jewish festival explicitly mentioned, just that he went up and greeted the church and then went to Antioch. If anything, this was a very short visit to Jerusalem. This was a lot of travel with very little comment on what happened. Have you ever traveled a long distance?