Originally Posted by
HWGeeks
the problem is what if the price goes up when you do this? What if you cancel and you try to book the lower rate but its no longer available and now you have a higher rate?
I have done this a couple of times, especially with DC-NRT flights. The procedure should be the other way around - book the cheaper flights all the way through payment, then cancel the original itinerary. No one from DL has ever complained.