On Wednesday, the U.S. Department of Transportation (DOT) filed a lawsuit in a San Francisco court against Southwest Airlines over “unlawful, chronic flight delays,” U.S. Transportation Secretary Pete Buttigieg announced in a Jan. 15 statement.

The DOT filed a lawsuit against Southwest Airlines, citing a pattern of chronic delays, as the government pushes for stricter accountability.

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

Southwest Airlines is being sued and Frontier Airlines fined over chronic flight delays by the Department of Transportation, the DOT announced Wednesday. Why it matters: Wednesday's announcement by the outgoing Biden administration's Transportation Secretary,

Transportation Secretary Pete Buttigieg said airlines have a legal obligation to ensure that their schedules list realistic departure and arrival times.

The Transportation Department said in a lawsuit that two of the airline’s routes were consistently delayed in violation of federal rules.

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 Biden Administration sued Dallas-based Southwest Airlines Wednesday for operating two “chronically late” flights, in the White House’s latest move to hold the industry accountable for delays and cancellations.

The Department of Transportation said that two Southwest Airlines routes arrived late nearly 180 times in a five-month period in 2022.

The agency is seeking civil penalties against Southwest Airlines, and also fined Frontier Airlines for its continuous delays.

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