What is the youngest age for flights?

Most pediatricians believe that a 4- to 6-week-old baby can handle airplane flights. But this guidance only refers to babies with no health complications who get the go-ahead from a pediatrician. Premature infants, as well as those with respiratory or other health issues, may fare better on the ground.



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In general, doctors recommend you wait to fly until your baby's immune system is better developed. This could be as soon as one month for full-term infants, though most doctors recommend anywhere between three months and six months.

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On most airlines, a baby has to be more than one week old to fly. In general, you should get approval from your pediatrician before traveling internationally with a child less than six months old. Also remember that your baby needs their own passport.

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Our unaccompanied minor service is required for kids 5-14, and optional for those 15-17, who are traveling alone. Here's how to book a ticket and prepare your child for their trip.

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Many pediatricians recommend waiting until your child is at least 3 months old before traveling long distances. This allows for their immune system to be better developed, making them more resistant to infections. This applies to babies who are born full-term and have no other health conditions.

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Lap infant fares on international flights Most international flights allow children under 2 to fly as lap children, but with one big difference — it's usually not 100% free. Typically, if you're flying on a revenue ticket, you must pay the taxes and fees for your lap infant plus, in some cases, 10% of the fare.

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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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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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The safest way for baby to fly: The AAP recommends that the safest way for your baby to fly is in a child safety restraint?an FAA-approved car seat or airplane harness device approved for your child's age and size installed with the airplane's seat belt. Booster seats cannot be used on airplanes.

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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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Will minors need an ID to fly domestically? Neither Southwest Airlines nor the TSA require children under 18 to provide identification when traveling within the United States. There is, however, an exception for Unaccompanied Minors traveling on Southwest Airlines.

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Original or photocopies of government-issued identification (e.g., passport, birth certificate, government-issued photo identification card) are the only acceptable forms of proof of age. Electronic screen shots, phone images, or immunization records are not acceptable.

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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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When you travel with a child under 2 years of age, you may choose to travel with the child on your lap (infant-in-arms) for free on all flights within the United States. Our step-by-step guide explains how to easily add an infant-in-arms to your ticket yourself.

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