Spirit Airlines Checked Baggage: Fees, 40 lb Limit & Tips

Spirit Airlines is an ultra-low-cost carrier (ULCC) built around unbundling: the base fare covers your seat and nothing else. If you plan to check a bag, you need to understand Spirit's fee structure before you get to the airport — prices at the counter are significantly higher than online rates, and there are no surprises worth paying for.

Spirit Airlines Checked Baggage Fees

Spirit charges per bag, per flight segment. Fees vary by route, whether you add the bag online in advance, and how close to departure you are when you pay.

Typical fee ranges (one way, per bag):

• Online when booking or shortly after: $45–$65 for most domestic routes
• Routes to/from the Caribbean, Latin America, or longer hauls: $65–$95
• Adding at check-in online (within 24 hours of departure): $55–$75
• At the airport ticket counter or kiosk: $75–$100+

The gap between online and airport pricing is substantial — often $30 or more per bag, per segment. On a round trip with one checked bag, booking the bag online at the time of purchase versus paying at the airport can save $60 or more.

Spirit allows up to 5 checked bags per passenger. The second and subsequent bags are priced the same as the first, so costs can add up quickly on multi-bag trips.

Weight and Size Limits for Checked Bags

Weight limit: 40 lbs (18 kg)

This is one of the key differences between Spirit and most legacy carriers. While airlines like Delta, United, and American allow 50 lbs (23 kg) for checked bags in economy, Spirit sets the limit at 40 lbs (18 kg). This catches many travelers off guard, especially those accustomed to other carriers.

Overweight fees:

• 41–50 lbs (19–23 kg): $30 fee
• 51–70 lbs (23–32 kg): $55 fee
• Over 70 lbs (32 kg): not accepted as checked baggage

Size limit: 62 linear inches (157 cm)

Linear inches are calculated by adding the length + width + height of the bag. Most standard checked suitcases fall under this limit, but oversized items such as large duffels, ski bags, or surfboards may exceed it.

Oversized fee: $100 per bag for items over 62 linear inches.

Items that are both overweight and oversized are charged both fees, so a 55 lb bag that measures 65 linear inches would incur both the overweight and oversized charges on top of the standard checked bag fee.

Spirit's Fare Bundles and Bag Inclusion

Spirit sells several fare bundles and add-on products that can change the checked bag math:

The Boost It Bundle includes a carry-on bag, a checked bag, seat selection, and priority boarding. If you need all of those things anyway, the bundle is typically cheaper than adding each item separately. Prices vary by route and booking timing.

The Bundle It tier includes similar extras. Spirit regularly updates its bundle names and contents, so verify what is included at the time of booking on the Spirit website.

Go ComfortPlus and Go Big fares (when available) may include a checked bag as part of the fare class. Always compare the total cost of a bundled fare against a bare-bones fare plus individually added bags — sometimes the upgrade is cheaper in total.

The "Big Front Seat" Does Not Include Bags

Spirit sells a product called the Big Front Seat — a wider, roomier seat at the front of the aircraft similar in feel to domestic first class on other carriers. It is important to note that the Big Front Seat is not a fare class upgrade; it is simply a seat selection. It does not include priority boarding, a carry-on bag, or a checked bag. Passengers who purchase a Big Front Seat still pay all the standard bag fees.

This is a common point of confusion. Passengers expecting the Big Front Seat to come with perks similar to business class on legacy carriers will be disappointed if they assume bags are included.

Online vs. Airport Pricing: Why It Matters So Much

Spirit's pricing model incentivizes pre-planning heavily. The airline makes airport and last-minute pricing punishing by design, to encourage customers to buy bags early:

Online at time of booking: Cheapest option, often $45–$55 for domestic routes.

Online after booking (through Manage Trips): Slightly more, but still meaningfully cheaper than airport prices.

Online within 24 hours of departure: Higher than standard online price, but still less than in-person.

At the airport (kiosk or agent): Most expensive. Spirit has been known to charge $100 or more per bag at the counter on popular routes.

If your plans are flexible, add the bag at the time of initial booking. If you forgot, add it as soon as you know you need it — every hour closer to the airport increases the price.

Spirit Fare Club Membership

Spirit's $Free Spirit frequent flyer program does not offer significant bag benefits unless you hold status. However, Spirit offers a paid subscription called the Spirit Saver$ Club (formerly the $9 Fare Club) that provides access to discounted fares and lower bag fees for members.

Saver$ Club membership costs around $70–$80 per year. If you fly Spirit more than two or three times annually and regularly check bags, the membership typically pays for itself through bag fee savings alone.

Tips to Save Money on Spirit Checked Baggage

1. Buy your bag at the time of booking. The price difference between buying your bag when you book versus paying at the airport can cover a meal or two. Never show up at the airport hoping to add a bag there.

2. Pack to 40 lbs, not 50. If you routinely pack to the 50 lb limit on other airlines, you will pay overweight fees on Spirit. Use a luggage scale at home before leaving.

3. Evaluate the bundles. If you need a carry-on, a checked bag, and seat selection, Spirit's bundles often undercut the à la carte total. Run the math for your specific itinerary.

4. Consider shipping instead. For longer trips with lots of gear, shipping luggage via services like FedEx or Luggage Forward can sometimes cost less than Spirit's round-trip checked bag fees, especially for multiple bags.

5. Maximize your carry-on. Spirit allows one personal item (such as a backpack or small bag that fits under the seat) for free. Carry-on bags require a fee unless included in a bundle. If you can consolidate into a personal item only, you avoid bag fees entirely.

6. Join the Saver$ Club if you're a repeat flyer. Frequent Spirit passengers who consistently check bags will recover the annual membership cost quickly through discounted bag rates.

7. Check fees by route before assuming. Spirit's fees are not uniform across all routes. A flight from Fort Lauderdale to Cancun may have higher bag fees than a flight from Detroit to Orlando. Always check the bag fee at the time of booking for your specific route.

Comparing Spirit to Other ULCCs

Spirit's 40 lb weight limit is notably lower than Frontier (50 lbs) and Allegiant (40 lbs — same as Spirit). If you routinely check heavy bags, Frontier may be a slightly better fit for your style of packing. However, both Spirit and Frontier charge bag fees by route and timing, so the total cost comparison depends entirely on your specific itinerary.

For international travel, Spirit serves destinations in the Caribbean and Latin America, but it does not operate long-haul transatlantic or transpacific routes. International bag fees on Spirit tend to be at the higher end of the $65–$95 range.

Final Thoughts

Spirit Airlines checked baggage is not free, not cheap, and not forgiving of last-minute decisions. The 40 lb weight limit, the sharp difference between online and airport pricing, and the lack of bag inclusion even on the Big Front Seat all mean that Spirit rewards prepared, flexible, light-packing travelers who buy bags early. For everyone else, the fees can quickly erode the savings of a cheap base fare.

Use CarrySizer's bag fee calculator to compare your total Spirit trip cost — with bags — against competing airlines on your route. You may find that a slightly higher base fare on a legacy carrier is actually cheaper once bags are included.