Air travel in the US will soon be back to normal, a senior Trump administration official said on Sunday, after a nationwide ground stoppage rocked the country and caused headaches for international flyers. Airlines rushed to restore regular schedules, leaving more than 6,100 flights cancelled and another 7,400 trips delayed as of Saturday night, according to aviation data firm FlightAware. On Sunday, more than 1,540 flights were cancelled and more than 1,330 delayed.