Travel regulations are set forth by the Transportation Security Administration and each individual airline. TSA regulations involve things such as what can be carried on board, acceptable identifications, and check-in procedures. As such, rules commonly stipulated by the airlines, such as the size and weight of acceptable luggage, can vary by company, though usually they do not. Regulations commonly cover both domestic and international flights.
Identifications acceptable for airline travel include a U.S. passport or passport card, Department of Homeland Security "Trusted Traveler" cards such as NEXUS, SENTRI, FAST, a U.S. Military ID (active duty or retired military and their dependents), a Permanent Resident Card and a driver's license or state photo I.D.
The Transportation Security Administration's list of items prohibited from passenger carry-on luggage are usually limited to the following categories: sharp objects, sporting goods, guns and firearms, tools, martial arts and self-defense items, explosive and flammable materials, disabling chemicals and other dangerous items. Specifics can be found on the TSA website.
The TSA allows parents traveling with infants to carry formula, food and other appropriate items, but recommends that no more than the amount necessary for the duration of the flight be carried.
Most airlines restrict carry-on bags to less than 40 pounds. In addition, they must fit in an overhead bin or under the seat, which means they should not exceed 45 to 55 inches.
All airlines have size and weight restrictions regarding checked luggage. Higher costs are incurred for checking in more than two bags and/or bags that weigh more than 50 pounds and/or exceed 62 linear inches.
