The customers would prevent any loss of the booking value due to any uncertainty on the same day of departure, hence Sun Country Cancellation Policy has been meant. But there is something beyond the flight cancellations that you should know. Otherwise, it might be regretful for you to face any unexpected after cancellation. So better, if you go through the policies mentioned below in the following bullets.

• According to the cancellation policy of Sun Country Airlines, if someone cancels the ticket within 24 hours of the purchase, then the customer is liable for a free cancellation and full refund. 
•  In case, if someone cancels their reservations after 24 hours of the air ticketing, the travellers are entitled to pay the fee for flight cancellations that depends on the fare type. 
• Customers are eligible for 24-hours-risk-free cancellations only when they book the flight at least seven days earlier than the departure.
• If someone wants to cancel their reservations on Sun Country Airlines because of the unexpected death of any family member or relative, they can cancel the flight for free on the same day of departure.

To know more about it read the full Blog.

Source :- https://thewion.com/cancellation-policy-possibility-to-cancel-the-flight-according-the-travel-plan/