Here is one possible timeline

33 Jesus’ crucifixion 

34? Paul’s conversion 

Arabia (Gal. 1:17 — NOT Jerusalem) 

Damascus (Gal. 1:17 — NOT Jerusalem; Wilson: “Cannot date Paul’s sojourn into Damascus” p. 82) 

37? Jerusalem (Gal. 1:18 — after three years, for 15 days; only saw Cephas/Peter and James, the Lord’s brother; Acts 9:26-30) 

Tarsus (where Barnabas finds him, Acts 11:25) 

Antioch (where Barnabas takes him, Acts 11:26) 

37-46 Still nine years unaccounted for! 

46-48 1st Missionary Journey with Barnabas (Acts 13-14) 

48 Jerusalem conference with Barnabas and Titus (Gal. 2:1, Acts 15) 

49-52 2nd Missionary Journey with Silas (Acts 15:36-18:21) Luke goes too. Timothy gets picked up in Lystra. 

51-52 Paul in Corinth 

53-57 3rd Missionary Journey (Acts 18:22-21:16) 

59-62 4th Missionary Journey (to Rome) 

Paul beheaded?