At what age do you pay for child airline ticket?

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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Infants under 2 years old can travel at no charge in the lap of their parent (any age), or an accompanying adult 16 years or older traveling in the same cabin. We welcome infants as young as 2 days old, but infants less than 7 days old require a 'Passenger Medical' form to be completed before your flight.

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Lap infants
United Airlines, Delta Air Lines, Southwest Airlines and many others have similar policies for domestic flights, with a cutoff age of 2 years old. On international flights, there is no fare for lap infants, but fees may apply. In most cases, you'll need to add the infant to the adult's ticket.

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We're here to take you and your family wherever you need to go. 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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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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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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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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To prove your child's age to an airline, one of the following documents will suffice: Child's passport (how to get a U.S. passport for an infant and things to know about children's passports) Child's birth certificate. Child's immunization form or other medical records may also work domestically.

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Related: Why you should travel while your baby is an infant If you have a trip that spans your child's second birthday, only the outbound flight will be free. On the return flight, you will be required to purchase your now-2-year-old a seat with a one-way ticket.

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Lap child policy. Who qualifies as a Lap Child? One child over 14 days and under two (2) years of age, not occupying a seat, may be carried as a Lap Child when traveling with an adult (12 years of age or older). Each adult may travel with one Lap Child.

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***If you're flying with toddlers car seat on the plane, the car seat can not be in an aisle seat. ***ALL children over the age of 2 require their own seat no matter of their size. SO, if you're flying with a 2-year-old, they will need their own ticket and their own seat and their own seat belt.

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You can either add the lap child at the time of booking or you can call at a later date and add the child. Note that even after your child has been born, most airlines have minimum age requirements to fly, usually starting at 7 days old. Check with your airline to confirm how young your baby can be when they fly.

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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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A child (2-11 years) or teen (12-15 years) cannot be added to an accompanying adult's booking online. Instead, you'll need to purchase an additional full-fare adult ticket and once you have made the booking, contact us via the chat function on our website so we can link the two bookings and change their passenger type.

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KIDS FLY FREE. At Frontier, we're committed to families, and what better way to show it than helping Kids Fly Free. That's right – Kids Fly Free with an adult through our DISCOUNT DEN® travel club. This means more reasons to travel with the family and more ways to save by flying Frontier.

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