Perhaps they could park the planes on the tarmac and the airports could operate a fleet of "mobile lounges" that would carry passengers from midfield boarding platforms to the main terminal. In fact, some clever engineer might put this lounge on a scissor or screw platform so it can "mate" with the plane, and this "planemate" could then speed them without ever exposing pax to the weather. The airport of the future!

Well, airport of the future, ca. 1960 anyway.