The lawsuit alleges Southwest illegally operated chronically delayed flights and disrupted passengers' travel plans.

DOT sues Southwest Airlines, accusing the airline of chronic flight delays while citing unrealistic scheduling that disrupted passengers.

A lawsuit filed against Southwest alleges the airline operated multiple “chronically delayed” flights affecting thousands of passengers.

Southwest is disappointed that DOT chose to file a lawsuit over two flights that occurred more than two years ago," a spokesperson for the airline said.

Southwest Airlines was sued in federal court by the Department of Transportation, while Frontier was hit with a $650,000 fine.

Having assessed a first-of-its-kind fine for “chronic flight delays” against JetBlue Airways, federal regulators have now moved to penalize both Southwest Airlines and Frontier Airlines for similar infractions.

The agency said the U.S. District Court lawsuit it filed in California on Jan. 15 alleges that Southwest illegally operated chronically delayed flights and disrupted passengers' travel plans. It says it's seeking "maximum civil penalties."

The Department of Transportation is suing Southwest Airlines, accusing it of operating two “chronically delayed flights” in 2022 that resulted in 180 flight disruptions.

The US Department of Transportation sued Southwest Airlines and fined Frontier Airlines for flight delays, seeking civil penalties against Southwest and imposing a $650,000 fine on Frontier, part of a broader crackdown on airline delay issues.

The lawsuit filed in California alleges that Southwest illegally operated chronically delayed flights and disrupted passengers’ travel plans.

Southwest in December 2023 agreed to provide $90 million in travel vouchers of $75 or more to passengers delayed at least three hours getting to final destinations because of an airline-caused issue or cancellation, part of a USDOT settlement over the carrier's December 2022 holiday meltdown.