When I first saw this post, I went to thetrip.com to track the flight. At that time, it was over Nebraska. Now, this is reported...

United Airlines/
#960 Depart San Francisco Intl, CA 8:44 pm Landed - - -
Arrive Chicago O'hare Intl, IL 2:03 am - B772


United Airlines/
#960 Depart Chicago O'hare Intl, IL 2:45 am Scheduled - - -
Arrive Paris (De Gaulle), France - B772


Arrived in ORD a little after 2:00am local time, and was scheduled to leave 1 hour ago, but does not show leaving..