Yes, you can bring a backpack on Frontier Airlines as your free personal item, as long as it fits under the seat in front of you (maximum 14" x 18" x 8"). Larger backpacks that need overhead space count as carry-on bags, which require a fee. To save money, it’s best to add any carry-on during online booking instead of waiting until check-in. Frontier’s low-cost model means you only pay for what you use — so a compact backpack keeps your trip affordable.
