The longest I ever endured behind the wheel was the escape from Hurricane Katrina in August of 2005. Twelve hours, barely 100 miles, 99% of it bumper-to-bumper creep-and-beep.
Distance, I guess from Austin, TX, back to NO in September of 1985, but then my wife and I took turns driving. By myself, it'd have to be the May 1993 run from New Orleans to Fort Worth and the succeeding runs from Fort Worth-Carlsbad, NM, from Carlsbad to San Antonio, and San Antonio back to NO.
Distance, I guess from Austin, TX, back to NO in September of 1985, but then my wife and I took turns driving. By myself, it'd have to be the May 1993 run from New Orleans to Fort Worth and the succeeding runs from Fort Worth-Carlsbad, NM, from Carlsbad to San Antonio, and San Antonio back to NO.