Traveling with Steve Homeward bound: UA 047 FRA to IAH, 40000 ft 23 February 2016 Steve Leave a comment That wing is spectacular. United 047, FRA to IAH. 40,000 feet. 87 mph headwinds. Ground speed: 500 mph. Time to Houston: 3 hours. Outside temp: -54 Fahrenheit. My second-ever flight in a Boeing 787 Dreamliner.