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

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

This "sends a message to all airlines" that DOT will go to court in order "to enforce passenger protections," Pete Buttigieg said.

The United States government is suing Southwest and Frontier Airlines, alleging "chronically delayed flights."

This past weekend, video surfaced of former UFC champion Khabib Nurmagomedov being kicked off a Frontier Airlines flight. The fighter turned coach was

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