The U.S. Department of Transportation said it has fined Frontier Airlines $40,000 for failing to display on-time performance for its flights on its website.
According to a DOT rule that became effective in April 2010, the 16 largest U.S. carriers must post information on their websites about the on-time performance of each of their flights.
The DOT said Frontier's on-time performance data were not available to consumers visiting the site during a period of time in early 2011, and that Frontier did not discover or correct the problem until after the DOT notified the airline.