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Spirit's carry-on size limit is 22 × 18 × 10 in (56 × 46 × 25 cm). This bag goes in the overhead bin and requires a paid carry-on add-on or a bundle fare that includes it. Spirit only includes a free personal item (18 × 14 × 8 in) by default — anything larger needs the add-on. The 18-inch width is more generous than most U.S. airlines, but the 22-inch height is the dimension that causes the most issues for rolling carry-ons once wheels and handles are included. This page focuses specifically on the paid carry-on bag, not the free personal item.
Spirit uses "carry-on" to mean the larger bag that goes in the overhead bin — not the free bag. Every Spirit fare includes one free personal item (18 × 14 × 8 in) that goes under the seat. Anything larger requires the paid carry-on add-on or a bundle fare that includes overhead bin access.
The carry-on has its own size limit (22 × 18 × 10 in) and its own cost. If you haven't purchased carry-on access and your bag doesn't fit as a personal item, you will be charged a gate fee — typically $65 or more, significantly higher than pre-purchasing online.
Spirit's carry-on dimensions are unusual compared to other U.S. airlines. The 18-inch width is more generous than most carriers, but the 22-inch height is where many rollers run into trouble. Understanding each dimension helps you choose the right bag.
This is the main constraint for rolling carry-ons. Many bags marketed as "22-inch" suitcases actually measure 22–23 inches externally once wheels and telescopic handle housing are included. A roller with an advertised 22-inch body may be 23 inches total. Bags that measure exactly 22 inches including wheels sit at the published limit — not over it, but not under it either. If your bag measures 23 inches externally, it exceeds Spirit's height limit on paper.
At 18 inches, Spirit's width allowance is more generous than most U.S. airlines (which typically allow 14–15 in). This extra width accommodates nearly all standard carry-on bags without issue. Width is almost never the reason a bag fails on Spirit.
The 10-inch depth accommodates most standard carry-on shapes. Hard-shell spinners, soft-sided rollers, and travel backpacks typically stay within this dimension. Overpacking a soft bag or using external pockets can push depth slightly beyond 10 inches, but this is less common than height issues.
Liters are a useful guide for estimating capacity, but Spirit measures external dimensions only. Here is how common bag sizes map to the 22 × 18 × 10 in carry-on limit:
These are general patterns. Always check your specific bag's external dimensions against 22 × 18 × 10 in — not its liter rating.
Most rolling carry-on suitcases are measured including wheels and handles, which often pushes total height to around 23 inches. Many of these bags are commonly used on U.S. airlines, but they may technically exceed Spirit's strict 22-inch height limit depending on how dimensions are measured. The bags below are chosen because they stay within the limit on paper.
Use the personal item page if you are trying to stay within the free under-seat allowance, or the full rules page for Spirit's complete baggage policy:
Use the calculator to see whether your packing setup fits Spirit's carry-on size in real-world conditions.
Open packing calculator →Spirit's carry-on size limit is 22 × 18 × 10 inches (56 × 46 × 25 cm). This bag goes in the overhead bin and requires a paid carry-on add-on or a bundle fare that includes it. The 22-inch height is the dimension most rollers struggle with once wheels and handles are included.
Yes. Spirit only includes a free personal item (18 × 14 × 8 in) on all fares. The carry-on bag is a paid add-on. You can purchase it during booking, add it later online, or pay at the gate — but gate prices are typically $65 or more, significantly higher than pre-purchasing online.
A bag with external dimensions of exactly 22 inches in height (including wheels and handles) sits at Spirit's published limit. Many bags marketed as "22-inch" actually measure 22–23 inches externally once wheels are included. If your bag measures 22 inches or under on all dimensions including wheels, it matches the limit on paper.
If your bag exceeds Spirit's carry-on size limit and you haven't pre-purchased carry-on access, you will be charged a gate fee — typically $65 or more. This is significantly more expensive than any pre-purchase option. If you have purchased the carry-on add-on but your bag still exceeds limits, it may be gate-checked at the airline's discretion.
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