Spirit Airlines offers a budget-friendly upgrade with its Big Front Seat, providing extra legroom and priority boarding at a lower cost than traditional First Class. While it doesn’t include luxury amenities like free meals or lie-flat seats, it offers added comfort and convenience for those seeking a more spacious flight without the hefty price tag. If you’re looking for a budget-friendly upgrade, it’s a solid option—but for full First Class luxury, you may want to consider other airlines.