It’s rightly called an LCC. But it’s also an HRC: a high-revenue carrier. Southwest long ago gained fame by inventing lowcost air travel, but its success today is just as importantly tied to the revenue power it exercises, not from having the best product, the most comprehensive loyalty plan nor the most ancillary services but from offering the best network for legions of domestic business travelers. It does, after all, carry more passengers within the U.S. than any other airline.