Major airlines have initiated a lawsuit against a new rule that mandates them to disclose additional fees upfront. This action has elicited a strong reaction from Transportation Secretary Pete Buttigieg. What Happened: The lawsuit was launched by Airlines for America, a trade association, and several major airlines, including Delta Air Lines (NYSE:DAL), American Airlines (NASDAQ:AAL), United Airlines (NASDAQ:UAL), JetBlue Airways Corp. (NASDAQ:JBLU), Hawaiian Airlines (NASDAQ:HA), and Alaska Airlines (NYSE:ALK), reported The Hill. The airlines are contesting the new rule, arguing that revealin…