What ID does a child need to fly within the USA?

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



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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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The airlines may require an age proof to ensure infant qualifies for infant fare. If you don't provide a proof, you may need to pay full fare to travel. A birth certificate is universallly accepted (from experience).

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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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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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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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Can I use my birth certificate to fly? For adults, a birth certificate cannot be used as a primary document when flying. However, it may be used together with other documents to confirm a traveler's identity if their ID was lost or stolen.

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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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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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Q: What is the Southwest Family boarding age limit? A: In order to take advantage of Southwest family boarding, you'll need to be traveling with a child who is 6 years old or younger.

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A minor travel consent form is a legal document, signed by a child's parents and/or legal guardians, giving permission for the child to travel with another adult. Any time a child travels abroad without both parents and/or legal guardians, they need to have this written permission.

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Children traveling with grandparents, cousins, other relatives, or school groups will need to have a signed document, such as a Child Travel Consent, allowing them to travel without a parent or legal guardian.

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Beginning May 7, 2025, every air traveler 18 years of age and older will need a REAL ID-compliant driver's license, state-issued enhanced driver's license, or another acceptable form of ID to fly within the United States.

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Do babies need an I.D.? Babies from the U.S. don't need an ID when flying domestically, says the TSA. This is actually true of anyone under the age of 18. But they will need a passport to fly internationally.

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Travel Documents and Information
  1. Valid photo identification. ...
  2. Travel tickets (plane, train, bus; can be paper or electronic copies)
  3. Boarding passes.
  4. Reservation confirmations (rental car, hotel, pre-paid tickets for events; can be paper or electronic copies)
  5. Credit and debit cards. ...
  6. Cash.
  7. Emergency contact list.


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Our Unaccompanied Minor program is only for children ages five through 11 years old. Children 12 and older are allowed to travel independently as Young Travelers. However, you should decide whether a Young Traveler is capable of and comfortable with doing all of the following independently: Navigating all airports.

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Unaccompanied minor flights are given by United Airlines to minors ages 5 to 14 who are traveling alone and are not accompanied by a family member or a known person. Children aged 15 to 17 are permitted to travel alone, however, the option to go as an unaccompanied minor is also accessible.

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