Skift Take

Sprint CEO Ben Baldanza doesn't care what anyone says about Spirit: He knows that his system is working.

Spirit Airlines Inc. SAVE +1.16% has scrimped its way to become, pound for pound, the most profitable airline in the U.S., helping reshape budget air travel by charging for everything from boarding passes to drinking water.

In five years, Spirit has gone from the cusp of bankruptcy to leadership of ultra-low-cost carriers, the airline industry’s fastest-growing niche.

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