I believe the round trip journey from Caesarea to Joppa was a four day journey. Day 1 - Acts 10:7 At 3:00 in the afternoon, Cornelius had a visitation. After speaking with the Angle of the Lord, Cornelius called two servants and a devout solder to tell them story. Acts 10:33 Cornelius told Peter he sent them immediately to Joppa. Day 2 - Acts 10:9 About noon the following day, the men were approaching Joppa and Peter went to the roof to pray. Acts 10:19 While Peter was wondering about the vision the men found Simon the Tanners house and called out to Peter. Acts 10:23 Peter invited them into the house. Day 3 - Acts 10:23b The next day Peter started out with them for Joppa Day 4 - Acts 10:24 The following day he arrived at Caeserea and Cornelius was expecting him. I hope this clarifies the time length of the journey. Blessing on you.