Scott Kirby, CEO of United Airlines, speaks during the WSJ's Future of Everything 2025 at the Glasshouse on May 29, 2025 in New York City.NEWARK, New Jersey — An oversupply of flights forced airlines to cut fares this year and pushed carriers to scale back their growth plans.United Airlines' expansion, however, is outpacing its large-airline rivals, a plan CEO Scott Kirby told CNBC is paying off because of the company's product, network and technology."This year is going to wind up demonstrating two things: ...