If you need to change your ticketed flights, such as the dates, destinations, or times, your ticket must be reissued. In most all cases, airlines will charge a fee for exchanging a ticket. The process for canceling or to reschedule a Delta flight is simple and is the same for flights paid with cash or miles. You can call (802-278-0759) or modify your flight online. You can make changes including time, date and location prior to departure.