Originally Posted by jsloan

CoC rule 5(H):


In combination with MileagePlus Rule #2 :


They’ve certainly closed accounts for this sort of thing before: UA is as Loyal as a 3 Dollar Bill [account closed]

ETA: Note that I’m inferring that you’re talking about something like booking two JNB-JFK itineraries with the intent to fly one or the other depending upon your schedule. If you actually mean booking JFK-TYO for October and JFK-BKK for December and not cancelling JFK-TYO until the last minute, then I agree; that’s a reasonable behavior that shouldn’t fall afoul of the rules.