Frontier Airlines Baggage Policy allows a single free personal item per traveler, fitting under the seat. Larger carry-ons and checked bags cost extra, with pricing influenced by weight, size, and time of purchase. Early payment through Frontier’s website provides the best rates. Travelers must ensure checked bags don’t exceed 40 pounds to avoid overweight charges. Frontier also enforces strict size limits, with oversized baggage subject to additional fees. Their policy supports low base fares by charging only for needed services. Passengers looking to save should plan ahead and use Frontier’s online baggage tools to minimize unexpected travel expenses.