Delta understands that travel plans will change, so it allows customers to cancel their tickets if necessary for any reason. It is really easy to cancel your Delta Airlines reservation. Further, for the passengers who have already booked their reservations in advance and are worried about how to make changes to their reservations,, They have access to the Delta Airlines Manage Booking option, which allows them to make adjustments quickly. With Delta cancellation policy, you can cancel your flights quickly and easily. Time limit: 24 hours Flight cancellation is another common practice among passengers after purchasing a plane ticket.