Originally Posted by
cranford
.... Will they put me on the next available even tho there may be no Z seats left?
What I was trying to say is there is no guarantee UA will do anything at all. If you miss your international flight on Z there is no guarantee of a future seat. As a gesture of goodwill UA might provide you a seat on future flight, doubt the availability of a Z seat will enter the discussion. There is a possibility UA will ask for a change fee to reschedule.
Suggestion don't let yourself get into this situation -- if weather looks like an issue, travel earlier.