Domestic Flights: Traveling with Parent or Guardian
Most airlines follow the rules of the Transportation Security Administration (TSA) when it comes to identification. So when flying within the United States, children under the age of 18 do not need ID to get through security. Once a child reaches 18, TSA accepts several forms of government-issued IDs to get through security.
Domestic Flight: Babies and Infants
As of 2010, the Transportation Security Administration only allows liquid in 3.4 oz (100 ml), or smaller, containers. But they've made exceptions for people flying with babies and infants. Baby food, formula, breast milk and juice are allowed in quantities above 3.4 oz, and they do not need to be placed in a quart-sized bag like other liquids with which you might be traveling. The TSA asks that you alert them if you're flying with any of these things because all of them are subject to searches. Also, be aware that most airlines allow babies and infants to fly as a "lap child," meaning they don't have a seat reserved, but you don't have to pay for them.
Domestic Flights: Unaccompanied Minors
If you're sending your child on a flight without an adult, then the same TSA rules apply when it comes to identification. But, each airline has different rules for traveling as an unaccompanied minor. For the most part, you'll need to fill out a short permission slip, sit with your child until he boards the plane and pay a fee. Even if you're not traveling, the airline will give you a pass that allows you through the TSA security checkpoint so you can wait with your kid. The best advice is to contact your airline when you book the flight to find out exactly what you'll need.
International Flights
Unlike domestic travel, if you plan on taking your child with you outside of the United States, then she will need a passport. The U.S. State Department has a different set of guidelines for minors to apply for a passport, most notably that it must be done in person. The State Department's website has a link to find the nearest "Passport Acceptance Facility," which is often a Post Office. In addition to your child's proof of citizenship (a birth certificate in most cases) you will need to present your valid, government-issued identification and a photocopy of it. Before you go to the passport office, be sure to check the State Department's website.
Pre-Boarding
Don't forget that traveling with kids often means boarding early. Most airlines now allow older passengers and frequent fliers first, but they'll still allow families with young children to board early. Ask your airline when you check-in, and be sure to pay attention when you're waiting at the gate.
