United CEO Jeff Smisek was on Sunday's flight from Houston to Chicago and called the 787 the 'world's leading airplane.'
The Chicago Tribune reports that the landing was greeted by cheers from passengers, including some aviation enthusiasts who said they wanted to be part of a historic event.
It was a long time coming, as Boeing recently started delivering the jets after more than three years of delays.
More than 800 have been sold to airlines around the world. Boeing has said the Dreamliner will be more fuel efficient than comparable jets and more comfortable for passengers.