Few passengers are literal no-shows. Some airline booking ploys result in passengers being literal no shows. This occurs when a round trip fare is cheaper than

Few passengers are literal no-shows. Some airline booking ploys result in passengers being literal no shows. This occurs when a round trip fare is cheaper than a one way fare (so the passenger is a no show for the return trip), or a trip from A to C with a layover in B is cheaper than a trip from A to B (so the passenger is a no show for the B to C flight). I've done the latter, where my internship is at A, my family is at B and I go to University at C. I book a trip C-A at the start of the summer and then a return trip A-C with a layover in B after my internship ends but some time before the next semester starts.