US airlines chase profits in premium cabins, deepening a fare class divide on flights

US airlines are expanding premium cabins and amenities to attract high-spending passengers, creating a growing disparity between premium and economy-class experiences. Airlines like Delta, American, and United are reconfiguring aircraft and investing in luxury features, with CEOs emphasizing the need to prioritize 'best' over 'cheapest' travel. United's CEO argues these investments aim to enhance experiences for all travelers, though critics highlight the widening gap between classes.