Planning to fly with Understanding the baggage policy is essential. Each passenger is allowed one free personal item that fits under the seat. Carry-on and checked baggage fees vary based on when and how you purchase them. Booking baggage online before check-in is more cost-effective than paying at the airport. Sun Country’s policy also includes clear guidelines for weight and size limits. Sports equipment, musical instruments, and pet carriers fall under special item rules. Avoid excess baggage charges by packing smart and reviewing their baggage chart. Travel light, travel smart with Sun Country Airlines baggage policies.