Originally Posted by jrl767

12. (1985) This is the year you finally take the family to Disney World! Disneyland is closer to your home in Portland, Oregon but Orlando also offers SeaWorld, Baseball World and Circus World. Though it’s always a challenge flying anywhere with three young children, you’re pleased to discover that between Portland and Orlando there’s a single daily one stop direct flight. Identify the airline, aircraft and enroute stops.

PDX-DEN-MCO, not United ... CO is too straightforward a guess (plus I think most if not all of their Florida service flowed through Houston/IAH at this time), so this must have been the short-lived Frontier Horizon which iirc operated a handful of 727-200s

Alas, Frontier Horizon had been sold off to Skybus by the time the OAG I used to reference this question was issued. You are getting much warmer though...