Frontier adds new nonstop flights to Atlanta for as low as $69

In this June 26, 2019 photo Frontier Airlines jetliners sit at gates on the A concourse at Denver International Airport in Denver. A new report says U.S. airlines are increasing their emissions of climate-changing gases much faster than they are boosting fuel efficiency. The International Council on Clean Transportation said Thursday, Sept. 12, 2019 that carbon dioxide emissions and fuel burning rose 7% from 2016 to 2018, overshadowing a 3% gain in fuel efficiency. The report ranked Frontier the most efficient among the 11 largest U.S. airlines. The Denver-based carrier has added more than 40 Airbus jets with more efficient engines. (AP Photo/David Zalubowski)