Spirit Airlines Infant Policy | Lap Child Rules, Baggage & Age Guide

Flying with a baby can feel overwhelming, but good preparation turns a stressful journey into a smooth and even enjoyable experience. Spirit Airlines recognises that parents need clarity, support, and flexibility when traveling with their little ones, so they’ve developed specific policies designed to make the journey as smooth as possible. Whether you’re travelling with a newborn on your lap, a toddler with their own seat, or juggling strollers, car seats, and diaper bags, understanding Spirit Airlines’ infant travel rules in advance gives you confidence and peace of mind.

Spirit Airlines trains its staff to provide full support for passengers with permanent mobility limitations or those who use a wheelchair regularly. Careful planning ensures that your baby remains comfortable, safe, and entertained while you focus on the joy of traveling together. With the right preparation, flying with an infant doesn’t have to be overwhelming—it can be a memorable and smooth adventure for the whole family.

Can You Fly with an Infant on Your Lap on Spirit Airlines?

Traveling with a baby can feel overwhelming, but Spirit Airlines makes it possible for infants to fly safely and conveniently on an adult’s lap. If your little one is between 7 days and 23 months old, they can fly for free without occupying a separate seat. Here’s everything you need to know to make your journey smoother.

Who Qualifies as a Lap Infant?

• Age range: Infants must be between 7 days and 23 months old at the time of travel.
  
• One infant per adult: Each adult passenger (aged 15 or older) may only have one lap infant.
  
• Seat requirement after 2 years: Once your child turns 2 years old, they are required to have their own seat and ticket.
  

Pro tip: If traveling with twins or multiple infants, you’ll need separate adult passengers for each lap infant, or purchase a seat for the additional baby.

Required Documentation

Spirit Airlines requires proof of age for lap infants:

• Accepted documents: Passport, birth certificate, or another official form of identification.
  
• Check in early: Having the proper documentation ready at check-in helps avoid delays at the airport.
  

Tip: You may need to show a birth certificate or passport even on domestic flights, so always carry proper identification.

Seating Restrictions for Lap Infants

• Emergency exit rows: Infants cannot sit in exit rows for safety reasons.
  
• Seats with inflatable seatbelts: Certain seats with special safety features are also restricted for lap infants.
  
• Lap seating vs. separate seat: While lap seating is convenient, for longer flights, it can become uncomfortable. Purchasing a separate seat allows you to use a car seat or infant harness for added safety and comfort.
  

Pro tip: Many parents prefer buying a separate seat for flights longer than 2–3 hours to make feeding, napping, and diaper changes easier.

Advantages and Considerations

Lap seating is ideal for:

• Short domestic flights
  
• Budget-conscious travel
  
• Quick trips where you want to avoid the hassle of booking an extra ticket
  

Consider purchasing a separate seat if:

• Your flight is long-haul or overnight
  
• You want to use a car seat for safety
  
• You need extra space for baby gear or comfort
  

How to Add an Infant to Your Spirit Airlines Reservation

Traveling with a baby requires a little extra planning, and one of the first steps is adding your infant to your reservation. Spirit Airlines makes this process relatively simple, whether you prefer doing it online or with the help of a customer service agent. Here’s everything you need to know:

Adding an Infant Online

The fastest and easiest way to add a lap infant is through Spirit’s website or mobile app. Follow these steps:

• Go to “My Trips” on the Spirit Airlines website or app.
• Enter your booking confirmation number and last name to retrieve your reservation.
• Look for an option to “Add Infant” or update passenger details.
• Enter your infant’s full name and date of birth as shown on their official ID.
• Review your updated booking to confirm that the airline correctly lists your infant.

Tip: Double-check the spelling and date of birth — errors here can cause issues at the airport.

Adding an Infant by Phone or WhatsApp

If you prefer speaking directly with an agent, Spirit Airlines customer service can help you add a lap infant to your booking.

• Call the official Spirit Airlines customer service number or use their WhatsApp service if available.
• Provide your confirmation number and personal details.
• Give the agent your infant’s full name and date of birth.
• Confirm that the airline updated your booking and request a new confirmation or revised itinerary.

Tip: Calling is especially useful if your booking is complex, includes multiple passengers, or if you want guidance on seat assignments for lap infants.

Spirit Airlines Infant Baggage Policy

Flying with a baby often means carrying extra gear, from diapers to strollers. Spirit Airlines makes it simple by allowing certain items for infants without additional charges. Here’s a complete breakdown of what you can bring for your little one:

Diaper Bag

• Allowance: Each infant is allowed one diaper bag for free.
  
• What to pack: Essentials like:
  
  • Diapers and wipes
    
  • Bottles and formula or breast milk
    
  • Pacifiers and toys
    
  • A change of clothes for the baby
    
• Tips for travel: Keep the diaper bag light and organized — use packing cubes or small pouches to separate items for easy access during the flight.
  

Pro tip: Keep items you’ll need in-flight (like diapers, wipes, and bottles) in a top compartment so you can grab them quickly without digging through the whole bag.

Personal Item

• Passengers may carry one personal item, such as a backpack, purse, or laptop bag, in addition to a diaper bag.
• This means you don’t have to sacrifice your own essentials — you can carry items like your phone, wallet, travel documents, or snacks on top of your baby’s diaper bag.
  

Pro tip: Use a compact backpack as your personal item that can hold both your essentials and a few items for your infant in case of emergencies.

Strollers and Car Seats

• Allowance: Each infant may bring one stroller and one car seat free of charge.
  
• Tips for travel:
  
  • Check with Spirit Airlines if your stroller or car seat meets size requirements.
    
  • You can gate-check your stroller with Spirit Airlines. Use it until boarding, then airline staff store it safely and hand it back to you at the arrival gate.
  • If you buy a separate seat for your infant, you can place an approved car seat on the aircraft to enhance safety and comfort.

Pro tip: For short flights, consider bringing a lightweight, foldable stroller to make navigating the airport easier.

Extra Advice for Smooth Travel

• Label everything: Make sure your stroller, car seat, and diaper bag are clearly labeled with your name and contact info.
  
• Pack wisely: Bring only what you need for the flight; bulkier items can be checked if necessary.
  
• Plan for security: Security allows liquids like formula or breast milk in reasonable quantities, but keep them separate and easily accessible for inspection.
  

Spirit Airlines Infant Stroller Policy

Navigating an airport with a baby can be challenging, but Spirit Airlines makes it simpler by allowing each infant to bring a stroller free of charge. Understanding the rules and best practices can save time and reduce stress.

How Many Strollers Are Allowed?

• One stroller per infant is allowed at no extra cost.
  
• Double strollers are also permitted for twins or two small children, again without extra charges.
  

Pro tip: If you’re traveling with multiple children, using a double stroller can make airport navigation much easier, but check the airline’s size and weight restrictions to avoid issues at the gate.

Checking Your Stroller

Spirit offers flexible options for checking strollers:

• Gate Check: Bring your stroller right to the gate. It will be tagged and taken by airline staff, then returned to you at the gate upon arrival.
  
• Ticket Counter Check: You can also check your stroller when you check in at the ticket counter if that’s more convenient.

Best Stroller Practices for Travel

• Lightweight and foldable: Choose a stroller that’s easy to fold and carry. This makes boarding, security, and airport navigation much simpler.
  
• Label your stroller: Clearly mark it with your name and contact info to prevent mix-ups at the gate.
  
• Keep essentials handy: If your stroller has a storage compartment, pack items like a small diaper bag or toys for easy access while waiting at the airport.
  

Pro tip: A compact, umbrella-style stroller is perfect for air travel — easy to fold, light to carry, and fits in tight spaces.

Spirit Airlines Infant Car Seat Policy

If you want extra safety and comfort for your infant during a flight, using a car seat onboard is a great option. Spirit Airlines allows FAA-approved car seats on the plane, but there are rules and best practices every parent should know.

When You Can Use a Car Seat

• Separate seat required: To use a car seat on the plane, you must purchase a separate ticket for your infant.
  
• FAA-approved only: The car seat must be approved by the Federal Aviation Administration (FAA) for airplane use. Check for the FAA label before your trip.
  

Tip: Using a car seat on longer flights can help your baby stay securely fastened, sleep comfortably, and reduce stress for both you and your little one.

Safety Restrictions

• Exit rows: Car seats cannot be installed in emergency exit rows.
  
• Inflatable seatbelts: Seats with inflatable seatbelts are also not compatible with car seats.
  
• Width restrictions: Most airplane seats fit car seats 16 inches wide or less. Taller or oversized car seats may not fit all rows, so check your seat assignment in advance.
  

Pro tip: Measure your car seat and compare it with Spirit’s seat dimensions before your flight to avoid last-minute surprises.

Best Seat Placement

• Window seat recommended: Installing the car seat by the window keeps the aisle clear, making it easier for you and fellow passengers to move around.
  
• Avoid middle seats if possible: This provides more space and reduces disturbances during the flight.
  
• Check seat type: Rear-facing seats generally fit best in window positions, while forward-facing seats may also work in certain rows.
  

Tip: If your infant sleeps in a rear-facing car seat, a window seat ensures they stay undisturbed and allows you to monitor them safely.

Extra Tips for a Smooth Flight with a Car Seat

• Bring a blanket or cover: This can make the car seat more comfortable and provide privacy if your baby is sleeping.
  
• Install it before boarding: Ask gate agents if you can board early to safely install the car seat.
  
• Check airline rules: Some Spirit flights may have row restrictions for car seats, so confirm during booking or with customer service.

Traveling with Twins or Multiple Infants on Spirit Airlines

Flying with one baby can be challenging, but traveling with twins or multiple infants requires extra planning. Spirit Airlines has clear policies to make it manageable and safe for parents. Here’s what you need to know:

Lap Infants: One Per Adult

• Spirit Airlines allows only one lap infant per adult.
  
• If you’re traveling with twins:
  
  • One parent can hold one infant on their lap.
    
  • The second infant must have a separate seat purchased, or another adult passenger can hold the second infant.
    

Pro tip: If possible, have both parents or another trusted adult travel with you. This makes managing two infants much easier, especially during boarding and in-flight.

Strollers for Twins

• Spirit allows double strollers for free, which is a huge convenience for airport navigation.
  
• Gate-check your stroller: You can use it throughout the airport until boarding, and staff will hand it back to you at the arrival gate.

Pro tip: A lightweight, foldable double stroller works best for crowded terminals and quick transitions from check-in to gate.

Infant Baggage Allowance

Spirit Airlines provides baggage allowances for each infant, even for twins:

• Diaper bag: Each infant can bring one diaper bag free of charge.
  
• Stroller: Each infant is allowed one stroller (double strollers count for two infants).
  
• Car seat: Each infant can have one FAA-approved car seat if a separate seat is purchased.
  

Pro tip: Label all items clearly with your name and contact information. For twins, consider using color-coded tags or covers to quickly distinguish each child’s belongings.

Additional Tips for Traveling with Twins

• Board early: Spirit lets families with infants board early, so use this time to get settled comfortably.
  
• Pack efficiently: Bring essentials in the diaper bag, but avoid overpacking. Focus on diapers, wipes, bottles, and a change of clothes for each child.
  
• Plan seating wisely: Consider window seats for car seats or a configuration that keeps the aisle clear.
  

Pro tip: Traveling with twins is easier when you plan your airport strategy: check in early, gate-check strollers, and keep essentials accessible for both babies.

Tips for Parents Flying with Infants on Spirit Airlines

Flying with a baby can feel overwhelming, but a little preparation goes a long way. From packing wisely to choosing the right seat, these tips will help make your journey with an infant safe, comfortable, and stress-free.

Carry Proof of Age

• Required documents: Always have a passport, birth certificate, or other official ID ready for your infant.
  
• Why it matters: Airlines use this to confirm your child qualifies as a lap infant (under 2 years old) and to avoid complications at check-in or security.
  

Pro tip: Keep the document in your personal bag or diaper bag so it’s easily accessible without digging through your luggage.

Choose the Right Seat

• Window seats: Ideal for car seats and lap infants because they keep the aisle clear for other passengers and for you to move around.
  
• Rear-facing car seats: Usually fit best in window positions.
  
• Avoid exit rows: Infants and car seats are not allowed in emergency exit rows.
  

Pro tip: If possible, plan your seating during booking to secure the best configuration for your baby and yourself.

Pack Light but Smart

• Essentials for a flight with an infant include:
  
  • Diapers and wipes
    
  • Bottles and formula or breast milk
    
  • Snacks (for older infants)
    
  • A few toys or comfort items
    
  • A change of clothes for both baby and parent
    

Pro tip: Use a small backpack or diaper bag with compartments for quick access to items during the flight.

Practice with the Car Seat

• Test fit: Before your trip, make sure your car seat fits comfortably in both your vehicle and the airplane seat.
  
• FAA-approved seats only: Ensure your car seat is labeled for airplane use if you plan to bring it onboard.
  

Pro tip: Practicing installing it at home reduces stress at the airport and ensures you know how to secure it quickly.

Ask for Help

• Airport staff assistance: Spirit Airlines staff can help with boarding, gate-checking strollers, and navigating the terminal.
  
• Family boarding: Board early with your infant so you can organize your space before the rest of the passengers enter the aircraft.

Plan for Feeding

• Bring enough milk or formula: Pack enough for the entire flight, plus a little extra in case of delays.
  
• Breastfeeding: Nursing on takeoff and landing can help reduce ear pressure for your baby.
  
• Bottles and sippy cups: Keep them accessible in your diaper bag for mid-flight feeding.
  

Pro tip: If you’re flying internationally, check security regulations for liquids like breast milk or formula—security officers generally allow reasonable amounts for infants.

Conclusion

Flying with an infant on Spirit Airlines can feel like a big challenge, but with the right preparation, it becomes an enjoyable and stress-free experience. By understanding the airline’s policies for lap infants, car seats, strollers, and baggage, parents can confidently navigate every step of the journey—from booking and check-in to boarding and in-flight care. Plan ahead, pack smartly, and confirm the documents and seating options the airline requires to keep your baby safe, comfortable, and content throughout the journey. Spirit Airlines’ family-friendly policies, combined with thoughtful preparation, allow you to focus on making travel memories with your little one, rather than worrying about logistics. With these tips and guidelines, flying with your infant becomes a smooth, manageable, and even memorable adventure for the whole family.

FAQs – Spirit Airlines Infant Car Seat Policy