The number of replies that can be summarized as “airlines don’t like this because they would prefer to be paid more” and/or “let me restate the policy in slightly different words for you” is kind of amazing. I guess it’s a species of mansplaining?
But anyway, a point I don’t think I’ve seen raised yet: there are already natural disincentives to using hidden-city tickets. One is that you can’t check baggage. Another, much more serious, is that the airline has no obligation to deliver you to the hidden city. Any number of circumstances might lead to them rerouting you. As long as they deliver you to your ticketed destination, you have no recourse.
