I have been looking for online resources that cover Paul’s three missionary journeys of Paul in Acts 13:1-14:28 and 15:30-28:31. I started by checking out the links at NT Gateway and, while some of the links are now broken, I found Craig Koester’s website Journeys of Paul to be a helpful introduction to the various places that Paul visited in Acts. If you have a favourite scholarly resource that you like to use online, please email me and I will add the link below.
There is also a recent Onscript Podcast where Chris Tilling interviews Douglas A. Campbell about his book Paul: An Apostle’s Journey. For online reviews of this book and his earlier Framing Paul: An Epistolary Biography, see here, here, here, here, here, and here. The question is whether we should slot the different letters of Paul into the timeline established by Acts or begin any reconstructions of the chronology of Paul’s life, travels, and letter-writing activity primarily from Paul’s own epistles first before looking to the points where Acts may corroborate, supplement, or disagree with them.