Originally Posted by
alex_b
Also I can't remember if this prohibition "Circle trips are not permitted. For example, you cannot fly from San Francisco to Hong Kong, to Auckland and back to San Francisco." was always in there or is a recent addition. Again it appears in the *A rules on UA.com but not in the MP rules on the same site.
That example has always been there, at least for a couple of months since I last did a read-through of the rules.
However, I'm not sure how strict this rule is for United booking purposes as USA->Europe->Africa->USA could be considered a circle trip, but has been bookable.