Paul, originally called Saul, was a religious leader at the time of the early church, and he hated the new Christians, (or followers of The Way, as they were called at the time). After Stephen was martyred (Acts 7:54-8:1), Saul approved. He soon began to persecute the Christians. In Acts 9, he was riding to the town of Damascus to kill christians, when Jesus appeared to him on the road in bright light, knocked him off his horse, and blinded him for three days. God sent a man called Ananias to go to Saul and teach him the Gospel. Saul (or now Paul) was converted, and felt convicted to begin preaching the gospel. Days after he first believed, he already gave his first sermon, and followed God's call to plant churches in the area ever since.
We are told in Acts 15:36, " Then after some days Paul said to Barnabas, "Let us now go back and visit our brethren in every city where we have preached the word of the Lord and see how they are doing."
Paul's missionary journeys are considered important because through his travels he spread the gospel and planted churches. I don't think you can say they were the most important, other people also took the gospel from Jerusalem to different parts of the world. Paul's journeys are well documented so we know about them.
In his undisputed letters Paul never mentions the missionary journeys. He definitely gives us no information consistent with the first missionary journey and only sparse and contradictory information about the second and third missionary journeys described in Acts of the Apostles. In fact, Raymond E. Brown (An Introduction to the New Testament) says the the three journeys are only a convenient classification developed by students of Acts.
The three missionary journeys were probably added to Acts of the Apostles for theological reasons rather than from records of Paul's itinerary.
Paul was sent on his missionary journeys by the Holy Spirit. So he went on his missionary journeys because God told him to.
His journey home began after the victory at Troy.
Paul's Second Missionary Journey began with Syria, Cilicia, Derby, and Lystra. He then passed through Phrygia and Galatia to Troas. Paul then sailed to Samothrace, Neapolis, and on to Philippi. Thessalonica was the next major stop and after a lengthy stay, Paul moved to Berea, Athens and Corinth before returning to Jerusalem via Ephesus.
Juan ponce De Leon's journey began on 1513
Missouri
We began our journey with the simplest of steps.
A Journey with Paul Cox - 1996 is rated/received certificates of: Belgium:KT
Barnabas was Paul's companion on his first missionary journey. They traveled together to Cyprus and Asia Minor to preach the gospel and establish churches.
Missouri
He probably finished his journey in approximately 3200 miles
Paul met Timothy, who was to become an important part in establishing the church and assisting Paul in his ministry. He also met Lydia, the jailer at Philippi, the Bereans, Dionysius and Damaris in Athens, Priscilla and Aquila at Corinth, Crispus, and Apollos to name but a few.
His third journey started in Antioch and it ends in Jerusalem......
Paul's first missionary journey was around 46 A.D. And he took along with him his aid, a person called Barnabas.