Major U.S. airlines, including Delta, American, and United, are suing the Biden administration over a new rule issued by the U.S. Transportation Department. This rule mandates upfront disclosure of airline fees, including charges for luggage and reservation changes, as part of the airfare. The airlines argue that the rule is confusing for consumers and exceeds the department's authority. The industry group claims that carriers already make these disclosures and calls the rule a 'bad solution in search of a problem.' The U.S. Department of Transportation, however, defends the rule as 'common-sense protections' aimed at avoiding unexpected fees for consumers. The airlines, who received government bailouts in 2020, are asking the court to block the rule, which they refer to as targeting 'junk fees.'