The lucky dip of stumbling on a cheap seat on a popular flight is starting to disappear. AI replaces those spreadsheets with models that weigh dozens of variables in real time and adjust continuously to demand, Bloomberg reported. Airlines from Delta to Virgin Atlantic are adopting the tools to squeeze more from every flight. The same models can cut fares on quieter routes to fill empty seats, so off-peak and low-demand flights could get cheaper. Critics counter that airlines run on thin margins and will use ever-sharper tools to lift average fares and fill more seats.