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

While the initial fine was $325,000, the DOT warned that if Frontier Airlines continues to chronically delay flights, the penalty will double.

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

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

Frontier Airlines has launched a new promotion where they will be giving away one year’s worth of free flights. Their “New Year, New Adventure” promotion will see one lucky person selected to receive free flights all year with the ability to choose from a range of international and domestic routes.