When and why does Delta Airlines introduce its no-show policy? When a passenger is unable to reach it on the flight, the delta no show policy is applied. Change or cancel the reservation if you know you won't be able to make it to the airport on time. Additionally, it should be finished before leaving. You'll be listed as a no-show if you don't. This regulation needs to be followed in order for travellers to keep the amount of their plane ticket.The refundable ticket policy is exempt from this rule.