When flying with Frontier Airlines, it’s important to know the personal bag size Frontier allows to avoid additional fees. Each passenger is permitted one free personal item, which must fit under the seat in front of you. The maximum dimensions for a personal bag are 14″ x 18″ x 8″, including handles and wheels. Items like backpacks, purses, and laptop bags typically meet these requirements. Larger bags may be considered a carry-on, subject to extra charges. By following the personal bag size Frontier rules, you can travel efficiently and avoid unexpected costs, ensuring a smooth and budget-friendly flight experience.