59 seconds
Between 10:35 a.m. and noon on December 17, 1903, the brothers made four flights. The first and second were 12 seconds, then 15 seconds on the third, and the final, long flight lasted 59 seconds. Distances covered were 120 feet, 175 feet, 200 feet, and 852 feet. Altitudes ranged between about 8 to 14 feet.