You may bring small bottles of liquids, gels or aerosols that are less than 3.4 ounces. You must place all the bottles into one clear, quart-sized, zippered bag. You may bring other liquids in larger amounts such as medicines or baby formula, but these must be declared at the security checkpoint.
What you can bring on board is determined by each airline rather than the airport, provided it is not an item prohibited by the TSA. For example, American, Continental, Delta and US Airways allow you to bring one bag and one personal item. Personal items include purses, laptops and similar items. Check with both the TSA and the airline on what you can bring on to the plane.
Most airlines allow some items in addition to the one bag and one personal item. These include things such as umbrellas, coats, hats, reading material, food that will be eaten on the plane and personal pillows. They also typically allow child or infant seats and strollers if you are traveling with a child, and medical or other devices for people with disabilities.
You may neither carry on board nor pack in your luggage things such as flares, gun powder, explosive material of any kind, flammable materials including fuel, gasoline or lighter fluid, disabling chemicals, including chlorine for pools and spas, and as of November 8, 2010, you also may not bring or pack toner or ink cartridges over 16 ounces.
