Originally Posted by
adm5175
I am curious if I can change the second (or 3rd+) leg of a trip to get a long (4+ hour layover) at my layover city. I am thinking about doing this so I can fly “through” ORD or EWR but actually get an evening in Chicago or NYC.
Welcome to FlyerTalk!
The answer is, "maybe." Until recently, this was something that could frequently be done on the app after beginning your trip. However, within the last few months, the app has stopped showing next-day changes in most (all?) cases. Therefore, you'd need to get a human to do it for you, and a human is more likely to enforce the rules than the old app was.