You can take expressed breast milk, boiled water to make up feeds or for drinking, formula powder and baby food on board. Take enough nappies and wipes, and a change of clothes for you and your child in your carry-on luggage.
TSA officers may need to test the liquids for explosives or concealed prohibited items. Although not required, to expedite the screening process, it is recommended that formula and breast milk be transported in clear, translucent bottles and not plastic bags or pouches.
The safest way to transport formula is to take cooled, boiled water and the powdered formula in separate containers. But if you need to transport bottles of formula that are already made up, make sure the formula is icy cold when you leave the house.
airport staff may open containers of expressed breast milk, formula milk, sterilised water and/or baby food to screen the liquids at the security point. The 100ml hand luggage restriction does apply to expressed breast milk, formula milk, sterilised water and/or baby food if you are flying without your baby.
Flying in an airplane can cause dehydration, which occurs much more quickly in a child than with an adult. Keep your baby well hydrated with water, juice, or milk.