Do babies fly free on Spirit?

A child under two years old (24 months) can travel for free as long as the infant will be on the lap of another passenger for the flight.



On Spirit Airlines in 2026, babies fly for "free" only if they are traveled as lap children. This applies to infants between the ages of 7 days and 2 years old. While you don't pay a "base fare" for a lap child on domestic flights, you may still be responsible for certain taxes and fees, especially on international routes to the Caribbean or Latin America. If you want your baby to have their own seat—which is safer and allows the use of an FAA-approved car seat—you must purchase a full-price ticket for them; Spirit does not offer discounted "infant fares" for seats. Additionally, Spirit allows you to check one stroller and one car seat per child for free at the ticket counter or the gate. If you choose the lap child option, you must still add the infant to your reservation and provide proof of age (like a birth certificate) during check-in to confirm they are under two.

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We will happily check one stroller and one car seat per child for no extra cost. If you are traveling with two children, you are more than welcome to check a double stroller instead.

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Spirit currently has no official family seating policy. It only states that it can't guarantee that you'll sit with your friends and family if you don't purchase seat assignments; it says that gate agents will work to provide adjacent seats for guests flying with children aged 13 and under whenever possible.

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Infants or children under 2 years of age can travel on the lap of an adult for free (within the United States) or at a reduced fare (for international travel).

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Ticket fares for babies and children On domestic flights, infants under the age of two often fly for free if seated on their parent's lap, and some airlines charge a (discounted) fare. On international flights, airlines often charge 10% of the adult ticket price.

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If a child has their second birthday between the outbound and return flight, a seat will need to be purchased for the return flight. Spirit reserves the right to request documented proof of age for any traveler 2 years old or younger. Please be prepared to provide documentation (birth certificate, passport, etc.)

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Once a reservation is confirmed, you are not able to modify the passengers on the booking. Simply create a new reservation for your additional passengers.

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There are no free snacks or drinks (even water) Unlike most major airlines, there are no complimentary beverages or snacks on Spirit flights.

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Even if you don't want to use your car seat on the flight itself, you may want to take your car seat on your trip. Most airlines will allow you to check a car seat into the hold for free in addition to your baggage allowance. This applies to toddler car seats and booster seats as well as baby car seats.

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1 personal item and 1 carry-on Diaper bags (1 per child)

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Most U.S. airlines will permit children who have reached their fifth birthday to travel unaccompanied. Kids ages 5 through 11 who are flying alone must usually travel pursuant to special “unaccompanied minor” procedures. On some airlines, these procedures are required for unaccompanied children as old as 14.

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He recommends traveling with the child's birth certificate and passport, as well as a handful of documents that only a parent would have, such as a school report card or health records, which can go a long way in defusing suspicion at a security checkpoint.

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You'll need to fill out an unaccompanied minor form and any necessary Customs and Immigration documents for the day of departure. This form must remain with your child during their journey. At check-in, parents / guardians will also need to provide: A birth certificate or passport as proof of the child's age.

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Age: 0 to 2 Years Old
Unless your child already has a passport that can be used to prove their birth date, you may need to bring a copy of their birth certificate. While some airlines are more lenient than others, it's always best to come prepared.

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Typically, minors under the age of 18 do not have to present identification for domestic U.S. travel. Airlines will accept identification from the responsible adult on behalf of the minor(s). For international travel, minors under the age of 18 must present the same travel documents as the adult.

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Additional infants under 2 years old must be ticketed and occupy an infant safety seat or in a separate aircraft seat. The infant must be under 2 years of age for the duration of the trip. If they turn 2 during a trip, they will need their own seat for the remainder of the trip.

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Using cotton balls, small earplugs, or noise-canceling headphones may help to decrease the decibel level your baby is exposed to, and also make it easier for them to sleep or relax. Keep in mind that sleeping babies are easier for everyone. If possible, travel at a time when your baby naturally sleeps.

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