Travel Tardiest to timeliest: Best and worst US airlines for on-time flights in 2019 February 19, 2020Dawn Gilbertson, USA TODAYComments Off on Tardiest to timeliest: Best and worst US airlines for on-time flights in 2019 The U.S. Department of Transportation's Air Travel Consumer Report says a flight is on time if it arrives within 14 minutes of schedule.