Hey, spirit airlines seat selection provides the option for seat selection at an extra cost, enabling passengers to pick their preferred seats ahead of time. Based on my experience, the online process was simple, just a few clicks and I selected a queue seat. If you are prepared to pay more, they also offer Big Front Seats that provide additional legroom. In case you do not choose a seat, one will be assigned to you at random when you check in. Since it’s a budget airline, opting for comfort will cost you extra!