About AD 49-52
2700 miles. 1300 by sea. 1400 on foot.
two-years
Silas (Acts 15:40) Timothy was added at Lystra Acts 16:1-3. Luke is the recognized author of Acts and has references later in chapter 16 that use the pronoun "we" so he was apparently with them on this trip.
The three places of Pauls journey were Corinth, Antioch and Thesolonica.
timothy
1 and 2 Thessalonians were written during Paul's Second Missionary Journey.
49 AD
Paul visited Corinth during his second missionary journey, where he stayed for over a year and a half. He visited Athens during his second missionary journey as well, after leaving Berea and before arriving in Corinth.
approximately 1,400 miles
About 18,000 miles. 10,000 by foot
Pauls first mission occurred in A.D. 47. The Book of Acts records this in Acts 13:2-14:28. The earliest of Paul's Epistles, Galations (A.D. 48), 1 and 2 Thess. (A.D. 50), occurred during Paul's second journey.
Silas was Pauls' companion on this journey as well as Timothy. Aquila and Priscilla went with him as far as Ephesus.
Paul received the "Macedonian call" while on his second missionary journey. His first trip to Europe was in response to this call. You can read about when Paul started his second missionary journey in Acts 15:36-41, and when Paul received the "Macedonian call" in Acts 16:6-11, and read about the first convert in Europe in Acts 16:14-15.
1st Missionary Journey - Barnabas. 2nd Missionary Journey - Silas. 3rd Missionary Journey - mostly alone, but assisted at various times by Luke, Timothy or Titus.