I have logged over 3,000 hours of travel on commercial airliners holding 400 passengers. (iresumecoverletter.com)
The balloon, made of plastic as thin as a dry - cleaning bag, rises to a float height of about 120,000 feet, which is three or four times higher than the cruising altitude of commercial airliners. (sciencedaily.com)
The balloons, once in the stratosphere, will be twice as high as commercial airliners and barely visible to the naked eye. (theguardian.com)