In a statement issued to Forbes, Southwest Airlines said that its impressive achievement was thanks to the carrier's “intentional investments to enhance the strength of our netw

The Transportation Department is stepping up enforcement of persistent flight delays with a civil lawsuit against Southwest Airlines and a fine against Frontier Airlines.

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

The U.S. Department of Transportation sued Southwest Airlines Wednesday, alleging it illegally operates flights that are persistently delayed, harming passengers and fair competition in the airline industry.

A Southwest Airlines pilot has been arrested by airport police, accused of driving under the influence before a scheduled flight. The airline confirmed the pilot has been removed from duty. This incident comes as the Department of Transportation sues Southwest over persistent flight delays.