The Southwest Airlines fleet of Boeing 737-800 and Boeing 737 MAX 8 will be among the first to be upgraded, with changes to the carrier's fleet of Boeing 737-700 aircraft set to follow shortly after.

Southwest Airlines is activating runway alerts across its fleet of Boeing 737s to boost safety. The alert system warns pilots if they're too fast, too high, or on the wrong runway.

Southwest Airlines is considering changes to its single-class, open-seating cabins to drive up revenue, CEO Bob Jordan told CNBC on Thursday, a shift that could be among the largest in the airline ...