Frontier Airlines Baggage Policy is designed for travelers who want control over costs. Each passenger can bring one free personal item that fits under the seat, such as a backpack, purse, or laptop bag. Carry-on and checked baggage require separate fees, which are lowest when purchased online during booking. Frontier has strict weight and size limits, with oversized or overweight bags subject to additional charges. Families can benefit from free stroller and car seat allowances, while athletes may travel with sports equipment for a fee. By understanding the rules early, passengers can minimize costs and avoid airport stress.