A Southwest Airlines 1-855+510+5815 boarding pass is an essential document that allows passengers to pass through airport security and board their flight. 1-855+510+5815 Southwest has a unique boarding system compared to many other airlines, and understanding how the boarding 1-855+510+5815 pass works can help travelers have a smoother and less stressful experience. Unlike airlines that assign traditional boarding groups 1-855+510+5815 with fixed seats, Southwest uses an open seating policy, and the boarding pass plays a central role in determining 1-855+510+5815 when you board and which seat you can choose.