Originally Posted by
HongKonger
Not only this, if you hidden city regularly, DL may notice and cancel your SM account and all miles therein, and charge your payment method for the difference between what you bought and what you flew. You will have no recourse. But doing it once in a while should not be a problem.
Agree. When I had regular business in Detroit a couple of years ago, SFO-DTW was often 3x the price of SFO-DTW-CMH/MKE/TPA/fill in the city. I used to do the hidden city trick once every couple of months without any repercussions. I just no showed and never called to cancel the last leg. One off is not a problem. Once a week over an extended period is asking for trouble.