Getting ready for a flight with Frontier? Therefore, it is essential to know the Frontier airlines size of personal item. Each traveler is permitted one complimentary personal item, which must not exceed 14 x 18 x 8 inches. Personal belongings of this size on Frontier Airlines must fit beneath the seat rather than in the overhead bin. You will be charged more for a carry-on if your... https://airlinesairportterminals.com/blog/frontier-airlines-personal-item-size/