The longest line ive ever waited in was probably Cheetah Hunt at Busch Gardens Tampa about 2 months after it opened. The wait time was posted as 90 min and i probably waited about 130-140 min. Me and my 7 year old niece were like 30-45 min into the line and it temporaily closed for Technical Difficulties and took about 35-40 min for it to reopen, and it was hot as hell out, over 90F, it was so hot that they were handing out ice cubes to people in line lol.
Another ride i waited in line for a long ass time was a KMG Speed at the Florida State Fair, waited close to 2 hours, since it only holds 8 people at a time and has a duration of about 5 min, and the stupid idiots running the ride only let 4 people at a time.