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.

A Southwest Airlines Co. affiliate argued to a California appeals court it’s entitled to an approximately $10.8 million sales and use tax refund because a ballot measure forbids increases to local taxes without voter approval.

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

The Department of Transportation claims Southwest Airlines operated two chronically delayed flights for a five month stretch that resulted in 180 delays.

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

The Department of Transportation sued Southwest Airlines Wednesday alleging it deceived customers by offering flights it knew it could not make on time.

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.

The Department of Transportation is suing Southwest for what it characterized as months of "chronically delayed" flights.

Transportation Department sues Southwest Airlines, seeking over $2.1 million in penalties for chronically delayed flights.

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.