first class allegiant air interior provides Legroom+ seats, which offer more space than regular sitting, for travelers who want even flying comfort. For passengers who would like a little more space to stretch out without having to pay for the benefits of a first-class cabin, these seats are perfect. The extra legroom can make a big impact, especially on trips longer than a couple of hours, even if the seats themselves are designed similarly to the rest of the cabin. Upgraded passengers also enjoy the advantage of being seated closer to the front of the aircraft, which speeds up deplaning.