Spirit Airlines' standard economy seats have 28 inches of seat pitch. Most airlines' economy class seats have 30 inches of seat pitch. Spirit Airlines' standard seats have tiny tray tables — you can't fit a laptop on them. However, Spirit's Big Front Seats guarantee an additional six inches of legroom.

Spirit Airlines is known for its "ultra-low-cost" model, which involves fitting more seats onto each aircraft to lower ticket prices. In a standard Spirit "Economy" configuration, the seat pitch (the distance between a point on one seat and the same point on the seat in front of it) is typically 28 inches, which is among the tightest in the industry compared to the 30–32 inches found on legacy carriers like Delta or United. The seat width is also narrow, often around 16 to 17 inches. However, Spirit's seats are "pre-reclined," meaning they do not move backward, which preserves that small amount of knee room for the person behind you. For travelers who need more space, Spirit offers the "Big Front Seat," which features a much wider 20–22 inch seat and a generous 35–37 inch pitch, similar to domestic First Class on other airlines. In 2026, Spirit has also introduced "Premium" seating options with four extra inches of legroom on select aircraft to stay competitive with other airlines' "extra space" offerings.