Regardless of age, all children need a valid passport for air travel to another country.
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U.S. citizens under age 16 may present a birth certificate or alternative proof of citizenship when entering by land or sea. All travelers must have a passport book for international air travel.
Children must have their own passport, visa or other international entry documentation required of adults. In addition, certain countries require children leaving that country without both parents and a legal guardian to have a letter of consent, in some cases notarized.
If you're traveling internationally with anyone under 18, you may be required to show documentary evidence of your relationship and a Letter of Consent or permission for the child's travel from the parent(s) or legal guardian not present. A passport is required for all international travel.
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.
Expired passports cannot be used to travel from the U.S. to an international destination or to travel to a foreign country for any length of stay longer than an airport connection en route to the U.S. or to a U.S. territory.
All children, including infants, must have their own passport or Trusted Traveler Program document for U.S. entry. Carry documents for traveling with minor children. If you are escorting a minor child without the parents, have a letter from both parents indicating that you have permission to travel with the minor.
If you're traveling internationally, the short answer is no, you cannot use an expired passport. You must renew your passport if it's expired or will expire within the next six months.
You may have to present proof of age like a birth certificate for any children under the age of 18. Families with children under 2 years old can ask to board early at the gate. Only 1 carry-on diaper bag per child is allowed.
The good news is that you can cruise to quite a few popular destinations without a passport, including Alaska, the Bahamas, Mexico, Bermuda, Hawaii, the Caribbean, Canada, and New England.
It's not uncommon for travellers to be refused entry to the UK at the border. Even if you are entitled to visa-free travel to the UK, or if have been granted a UK visa in advance of travel, you're not guaranteed entry into the country.