What documents does a child need to fly Frontier?

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.



For domestic travel within the United States on Frontier Airlines in 2026, children under the age of 18 typically do not require a photo ID. TSA regulations allow minors to travel with their parents or guardians without showing identification at the security checkpoint, as the adult's ID and boarding passes are sufficient. However, if the child is traveling as an Unaccompanied Minor (UNMR), Frontier requires a specific "Unaccompanied Minor Form" to be completed, and the adult dropping them off must provide a valid government-issued ID. For infants traveling as "Lap Children" (under age 2), Frontier may require a Birth Certificate to verify the child's age, especially if the child looks close to the age limit. For international flights to destinations like Mexico or the Caribbean, every child, regardless of age, must have their own valid Passport. Additionally, if only one parent is traveling internationally with the child, Frontier and border authorities strongly recommend a notarized Letter of Consent from the non-traveling parent to prevent issues regarding international parental child abduction laws.

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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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Be sure to attach government-issued identification for the child (e.g., passport, birth certificate, government-issued photo identification card) and provide the confirmation number of the ticket purchased for the child.

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Every US citizen, regardless of age, must have a passport to travel abroad. Newborn babies, infants, and toddlers all need a passport to leave and enter another country. Just as if an adult was applying for a passport, babies must have Form DS-11 filled out and submitted.

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Does a 2-year-old need a plane ticket? Yes – once kids turn 2, they no longer qualify as a lap infant. They'll need their own ticket and their own seat to fly. However, some airlines may have slightly different rules or promotions, so it's worth doing a little research.

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What is a Child Travel Consent form? A Child Travel Consent gives a minor child permission to travel without their parents or legal guardians. Use this form when your child needs to travel alone or with another adult, who is not their legal guardian (e.g., a grandparent, friend, or teacher).

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A child travel consent form allows a minor to travel alone or with another person or group. It is written by one or both parents and can be used for domestic or international travel.

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Every US citizen, regardless of age, must have a passport to travel abroad. Newborn babies, infants, and toddlers all need a passport to leave and enter another country.

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In general, if traveling by air to a foreign country, all passengers must have a valid passport irrespective of their age, including babies and infants.

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You'll need to present your passport providing proof of citizenship and identity when you check in for international flights- it's the law. It's your responsibility to know what additional documentation is required for entry into any foreign country to which you are flying.

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As such, kids are not allowed to fly alone on Frontier Airlines until age 15. Frontier barring kids from traveling alone is not unique to the ultra-low cost carrier space. Of Frontier's five other main ULCC competitors, Spirit Airlines is the only one that currently offers an unaccompanied minor service.

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