How Does Southwest Boarding Work? Boarding groups on Southwest Airlines work systematically and smoothly. Here, it is a well-organised way that helps travellers enter the aircraft without facing any difficulty. Moreover, each flyers here get their boarding groups southwest numbers after completing the check in. Further, the sequence of the process begins from preboarding to the group 1-8 procedure. There, groups are called one by one through the announcement, so flyers have to line up accordingly before the process starts. To get more information about the boarding groups, one can visit the official website of Southwest Airlines or read the above blog provided by Group Travel Airlines.