Flying with Formula: Airport Security Rules for Australian Parents
Good news for travelling parents: baby formula — both powder and made-up bottles — along with the water to mix it and expressed breast milk, is exempt from the usual 100ml liquid limit when you're flying with an infant from an Australian airport. You can carry a reasonable amount for your journey in your hand luggage on both domestic and international flights. You'll just need to declare these items at the security point so they can be screened separately.
Flying with a baby is nerve-wracking enough without worrying that security will confiscate your formula at the gate. So here's a clear, practical rundown of the airport rules for baby formula in Australia, what to pack, and how to sail through screening with a hungry little one on your hip.
Are baby formula and milk exempt from the 100ml liquid rule?
Yes. Australia's aviation security screening applies Liquids, Aerosols and Gels (LAGs) rules to flights departing Australian airports, which normally limit containers to 100ml inside a single one-litre transparent bag. However, there is a specific exemption for parents travelling with babies and young children.
When you are travelling with an infant, the following are allowed in quantities reasonable for the trip and do not have to fit inside the one-litre bag:
- Powdered baby formula
- Made-up bottles of formula
- Expressed breast milk (with or without the baby present on most airlines — check yours)
- Water for making up formula
- Baby food, purees and reusable food pouches
- Cooling gel packs to keep milk cold
“Reasonable for the trip” means enough for the flight plus delays — you don't need to ration to a single bottle, but a week's supply in your carry-on may attract questions. Pack the bulk in checked luggage and keep what you'll need in the air with you.
Does this apply to domestic flights too?
Domestic flights within Australia are generally not subject to the same strict liquid limits as international departures, but screening still applies and the baby-product exemption covers you either way. Whether you're flying Sydney to Perth or heading overseas, you can bring formula, milk and baby food through the checkpoint — just declare it.
For international travel, remember that the rules on your return or connecting flights are set by that country's authorities. Most have similar baby-food exemptions, but it's worth a quick check of your destination's rules before you fly.
How to get through security smoothly
- Separate baby items before you reach the checkpoint. Take formula, bottles, breast milk, water and gel packs out of your bag and have them ready in a tray.
- Declare them to the security officer. Let staff know you have baby formula and milk before screening starts. These go through a separate process and don't count against your one-litre liquids bag.
- Keep powder accessible. Powdered formula isn't restricted, but it may need to be taken out and screened separately, so pack it where you can reach it easily.
- Expect possible extra checks. Officers may open containers or test liquids. This is routine — it doesn't mean anything is wrong.
- Carry only what you'll use in the air. Bulk supplies belong in checked baggage to keep your hand luggage light and screening quick.
For the bigger picture on feeding in the air, our guide to flying with a bottle-fed baby covers timing feeds, settling baby on take-off and more.
The safest way to prepare formula while flying
The Raising Children Network recommends making formula up fresh for each feed rather than carrying warm, pre-made bottles, which aren't safe to keep warm for long. For a flight, the simplest safe approach is:
- Carry pre-measured formula powder in a clean dispenser.
- Ask cabin crew for hot (freshly boiled) water, or bring cooled boiled water in a bottle.
- Mix a fresh bottle when your baby is hungry, then cool it to lukewarm before feeding.
If you'd rather warm a bottle than mix one mid-flight, see whether you can use a bottle warmer on a plane — and how to plan around it. Our guide on how to warm formula while travelling has more options for airports, hotels and long-haul trips.
Flying with breast milk
Expressed breast milk is treated the same way as formula — exempt from the 100ml rule in reasonable quantities and screened separately when you declare it. Frozen or chilled milk with gel packs is fine to carry. For the full run-down on transporting, chilling and thawing milk on a trip, read our guide to travelling and flying with breast milk.
Handy things to pack in your carry-on
- Pre-measured formula powder in a sealed dispenser
- Sterilised bottles (one per expected feed, plus a spare)
- A small insulated bag with a gel pack for chilled milk
- A portable bottle warmer for warming bottles on arrival
- Reusable food pouches if your baby has started solids
- Extra bibs, wipes and a change of clothes (for both of you!)
Once you land, a portable bottle warmer makes it easy to bring a chilled bottle up to body temperature in the hotel or car without hunting for boiling water. Shop travel bottle warmers →
Frequently asked questions
Can I take baby formula through airport security in Australia?
Yes. Baby formula (powder and made-up), water to mix it, and breast milk are exempt from the 100ml liquid limit when you're travelling with an infant. Declare them at the checkpoint so they can be screened separately.
How much formula can I bring on a plane?
A reasonable amount for your trip, including allowance for delays. There's no strict millilitre cap for baby milk, but keep bulk supplies in checked luggage and carry only what you'll need in the air.
Do I have to taste the formula or milk at security?
Australian officers may open or test containers as part of routine screening, but you generally won't be asked to drink it. Allow a little extra time at security in case of additional checks.
Can I bring made-up bottles, or only powder?
Both are allowed. However, made-up formula isn't safe to keep warm for hours, so for longer flights it's best to carry powder and mix bottles fresh with hot water from the crew.
Are the rules different for domestic and international flights?
Domestic flights within Australia have more relaxed liquid rules, but the baby-product exemption covers you on both. For international trips, also check the liquid rules of your destination and any connecting countries.
Can I bring ice or gel packs to keep milk cold?
Yes. Cooling gel packs for breast milk or made-up formula are permitted. Declare them with your other baby items at the checkpoint.
