How old child can travel in flight?

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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In general, pediatricians recommend that newborns not fly until their respiratory and immune systems are fully developed. This often means that a newborn should not fly until they're three to six months old. However, these dates can vary greatly from child to child.

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Planning your trip
  • Infants on lap. Children under two can sit on a parent's lap during flights to any destination.
  • Infant seats. Alternatively, infants can have their own seat if you bring an approved car seat.
  • All other kids. Children older than two will need a ticket and their own seat on the plane.


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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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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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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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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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How much does a child ticket cost? The price of a child ticket will differ from airline to airline. Some airlines offer discounted prices for children, whereas others have a flat fare for adults and children. On average, discounted airline tickets for children are around 25—33% cheaper than adult tickets.

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Make sure you bring plenty of pacifiers and bottles with you on the plane so that your baby can use them as needed throughout the flight. If your baby is particularly sensitive to loud noises, consider using ear plugs or ear muffs while flying.

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Young babies have not developed the ability to regularize their ear pressure by yawning or swallowing, so they don't know how to relieve the abrupt changes in pressure when the plane is taking off or landing. To prevent ear pain and discomfort, babies should wear ear protection whenever they're travelling on a plane.

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Standard strollers, folding wagons, and car seats can be used to get to your gate and then checked for free. They'll be returned to you on arrival. Collapsible strollers can be stored in-cabin. Car seats can be used onboard your flight too.

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Although children who have not reached their second birthday are permitted to travel as lap children, the FAA strongly discourages this practice and recommends that you secure your child in an approved CRS in their own seat for the entire flight.

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International Travel. Regardless of age, all children need a valid passport for air travel to another country. The application process for children under the age of 16 needs to be completed in person.

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If you travel or are going to travel with a child, consider taking the following documents: If the child is traveling with only one of their custodial parents, they must have a letter of consent, preferably in English and notarized, from the other parent or signed by both parents.

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United States Customs and Border Protection (CBP) requests written consent from both parents or the parent who is not accompanying the minor for minors (those less than 18 years of age) traveling to the U.S. alone or accompanied by only one parent. This written consent must be in English.

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Typically, children above the age of 2 require their own seat and will need a flight ticket. While some airlines may allow children under 2 to travel for free on domestic flights when sitting on an adult's lap, it's recommended to purchase a separate seat for their comfort and safety.

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YOU WILL NEED TO PURCHASE A TICKET FOR YOUR CHILD IF YOU: Have a child that is 2 years old or older. Have a child that turns 2 during the trip. Prefer the child sit in a seat with an FAA-approved child safety seat. Already have a child that will be sitting in your lap, regardless of age.

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Yes, a 3-year-old generally requires their own flight ticket and seat. Airlines typically consider children above the age of 2 as individuals who need separate seating arrangements. It's essential to purchase a ticket for your 3-year-old to ensure they have a designated seat for the flight.

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Children. TSA does not require children under 18 to provide identification when traveling within the United States.

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Spirit Airlines reserves the right to request documented proof of age for any passenger 2 years of age or younger. You must be prepared to provide documentation (such as the child's birth certificate or passport) upon request.

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