How much baby milk can you travel with?

Formula, breast milk, toddler drinks, and baby/toddler food (to include puree pouches) in quantities greater than 3.4 ounces or 100 milliliters are allowed in carry-on baggage and do not need to fit within a quart-sized bag.



You are allowed to travel with a "reasonable quantity" of baby milk, which is an exception to the standard 100ml liquid rule. In 2026, the TSA (US) and most international authorities (including the UK and EU) allow you to carry formula, breast milk, and sterilized water in containers larger than 100ml in your carry-on luggage. "Reasonable" is generally interpreted as enough for the duration of the journey and any potential delays. At modern airports equipped with CT or C3 scanners (like many terminals at Heathrow or Shannon), you can often leave these liquids inside your bag in quantities up to 2 liters. At older checkpoints, you must remove them for separate screening. You do not need to be traveling with the infant to carry breast milk. Be prepared for security to test the liquid using vapor analysis or a small sample; however, you can request that they do not open the containers and instead use alternative screening methods like an Explosive Trace Detection (ETD) swab of the bottle's exterior.

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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.

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You must take no more than 100 ml of any liquid on a flight. You must place liquids into individual 100 ml containers and remember that, in most cases, security won't accept larger containers, even if only partly full.

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Airlines allow baby food, formula, and breast milk in a carry-on bag, but the TSA has a 3-1-1 rule for liquids, including all baby food items. Each passenger is allowed 3.4 ounces or less of liquid, gel, or aerosol products per container, and all containers must fit in one clear, quart-size bag per person.

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Help the Parents
If a baby is crying and the parents are having trouble consoling them, a flight attendant may offer to help out. This could involve anything from holding the baby for a few minutes so the parents can take a break, have their own bathroom visits, etc.

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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.

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Most international flights allow children under 2 to fly as lap children, but with one big difference — it's usually not 100% free. Typically, if you're flying on a revenue ticket, you must pay the taxes and fees for your lap infant plus, in some cases, 10% of the fare.

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Water for babies is allowed in reasonable quantities in carry-on bags. Remove this item from your carry-on bag to be screened separately from the rest of your belongings.

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Air travel increases a newborn's risk of catching an infectious disease. Babies born prematurely, with chronic heart or lung problems, or with upper or lower respiratory symptoms may also have problems with the change in oxygen level within the air cabin.

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They may be in pain because of pressure changes at takeoff and landing; they may be tired and find it difficult to sleep without their normal surroundings; they might want to move around instead of being stuck in a confined space or they might be disoriented and scared.

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Can I bring water for baby formula on a plane? Yes! Again, water for baby formula and babies is permitted by TSA in “reasonable quantities” in carry-on bags.

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Again, this is why I love swaddle blankets when it comes to traveling on an airplane!! You can use your swaddle blanket between your skin and your warm, sleeping baby. Then, simply drape the extra blanket over your baby's head and tuck it into the seat behind you so it's a secure cover while your baby is sleeping.

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You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.

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Sanitizing Wipes: Wet wipes, in any quantity, can be carried on. This includes baby wipes! Disinfectant sprays: You are allowed to have sprays in your carry-on bag as long as they do not exceed 3.4 oz. Pack larger sizes in your checked luggage.

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Products containing powdered or dry milk (baby/infant formula, baking mixes, soup mixes, drink mixes) are allowed in small quantities, if they are properly labelled.

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Can you take an empty 500ml bottle on a plane? Yes, you can bring an empty water bottle on a plane. According to TSA, you can bring an empty water bottle on a plane by packing it in your checked bag or by stowing it in your carry-on.

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