Get ready for changes in boarding and pick-your-own seating at Southwest Airlines. Here’s what travelers might see this fall.

Southwest Airlines, renowned for its single-class open seating policy, is contemplating a revamp of its seating and boarding procedures as part of an ongoing effort to enhance revenue streams.

DALLAS — Southwest Airlines is studying changes to its quirky boarding and seating policies as it searches for ways to raise more revenue. Airline officials say they are studying possible ...