1-844-414-9223 If traveller want to cancel a flight due to some reason, they can simply visit the official website of FlyoStudio or sun country.com, where you can get the best option for Sun Country Airlines refund policy. According to this If a traveller cancels their flight within 24 hours of making their initial booking, they will receive a full refund. If a customer changes their ticket after 24 hours, they will be charged even if the departure is seven days away.