25. Seat 2A has guessed Huntsville (HSV) as the intermediate stop between Memphis and Knoxville.....and he is correct! Here's the complete sched......
UA 828: Memphis (MEM) 2:50p - 3:30p Huntsville (HSV) 3:55p - 5:33p - Knoxville (TYS) 6:00p - 7:10p Pittsburgh (PIT) 7:35p - 8:13p Cleveland (CLE)
Freq: Daily
Equip: CARAVELLE JET
Service class: F
I actually saw this flight on the ground in Huntsville back in 1969 as I was preparing to depart from HSV on Eastern. It was my very first sighting of a Caravelle.