Quick Answer
Pack one nappy for every two hours of travel, plus two or three spares, and keep wipes, nappy cream, a change of clothes, muslins, snacks, and milk or formula within easy reach. Pack in layers with nappy-changing supplies on top so you can grab them one-handed. In the UK, baby food, milk, and sterilised water are exempt from the usual 100ml hand-luggage liquid limit – you may carry what you need for the journey.
*(Note for UK readers: “nappy” is used throughout – “diaper” is the American term for the same thing.)*
The Nappy Maths: How Many Do You Need?
The golden rule is one nappy per two hours of travel, plus two to three spares. Delays happen, blowouts happen, and running out mid-journey is miserable.
| Journey length | Nappies to pack |
|—|—|
| 2–3 hours | 4–5 |
| 4–6 hours | 6–8 |
| 8–12 hours (long haul) | 9–12 |
| Full day out | 8–10 |
If your baby is still newborn, lean towards the higher end – newborns can go through 10 to 12 nappies in 24 hours.
The Full Checklist
Work through this list before every trip:
Nappy changing
– Nappies (see maths above)
– Travel pack of baby wipes, plus a spare pack for long journeys
– Nappy rash cream
– Disposable changing mats (2–3)
– Nappy sacks for dirty nappies and soiled clothes
Clothes
– One full change of clothes for baby (two for long haul)
– A spare top for you – blowouts travel upwards
– Muslin cloths (3–4) – for spills, sick, shade, and emergency bibs
– A light blanket or extra layer, depending on the weather
Feeding
– Bottles and formula, pre-measured in a dispenser, or expressed breast milk
– Sterilised water if making up formula on the go
– Snacks: rice cakes, fruit pouches, oat bars for older babies and toddlers
– A bib and a sippy cup for toddlers
Comfort and health
– Dummy/pacifier plus a spare, with a clip
– A favourite small toy or comforter
– Infant paracetamol sachets (check age guidance on the packet)
– Teething gel or a teething ring
– Sunscreen and a sunhat in summer
Paperwork
– Passport, boarding passes, and travel insurance details
– A copy of any prescription or allergy information
The [NCT](https://www.nct.org.uk/) has excellent practical checklists for travelling with babies if you want a second pair of eyes on your packing.
Step-by-Step: Packing in the Right Order
Step 1: Start with the Heavy Items at the Bottom
Bottles, formula tins, and snack boxes go at the bottom of the bag. This keeps the weight stable and stops the bag tipping over.
Step 2: Layer Clothes and Muslins in the Middle
Roll rather than fold – rolled clothes take up less space and crease less. Tuck muslins around the edges where they double as padding.
Step 3: Put Nappy-Changing Supplies on Top
Everything you need for a change – nappies, wipes, cream, a mat, and a nappy sack – should sit at the very top or in an outside pocket. You want to reach them one-handed while holding the baby in the other arm.
Step 4: Use Pouches and Packing Cubes
Group items into small zip pouches: one for changing, one for feeding, one for medicines. When you are bleary-eyed at 30,000 feet, labelled pouches beat rummaging.
Step 5: Keep Valuables and Documents Separate
Passports and phones go in a small cross-body pouch or a zipped inner pocket – never loose in the main compartment where they can fall out during a nappy change.
UK Airport Security: Baby Food and Milk Rules
This is where many parents worry unnecessarily. UK airport security exempts baby food, baby milk, and sterilised water from the 100ml liquid rule. You may carry:
- Expressed breast milk
- Ready-made formula
- Sterilised water for making up feeds
- Baby food pouches and jars
You are allowed to take what you reasonably need for the journey. Security staff may ask you to taste-test the milk or have it screened separately – this is routine, so allow a few extra minutes at security. Keep all baby liquids together in a clear bag at the top of your hand luggage so they are easy to present.
Compact Folding and Space-Saving Tips
- Roll clothes instead of folding them.
- Decant wipes into a slim travel case rather than carrying the bulky full pack.
- Use a backpack-style changing bag – it distributes weight better and leaves both hands free.
- Pre-portion formula into a stackable dispenser instead of carrying the whole tin.
- Wear the bulky items – put baby’s coat on them rather than in the bag.
- Limit toys to two – one comforter and one small new toy for novelty on long journeys.
Frequently Asked Questions
How many nappies do I need for a flight?
One per two hours plus two or three spares. For a 7-hour flight, pack 8 to 10 nappies. You can also buy nappies airside at most large UK airports if you are caught short.
Can I take baby milk through UK airport security?
Yes. Baby milk, expressed breast milk, sterilised water, and baby food are exempt from the 100ml limit. Bring what you need for the journey; staff may screen it separately or ask you to taste it.
Should I pack nappy cream in hand luggage or hold luggage?
Hand luggage. Nappy rash can flare up during travel with heat and infrequent changes, so keep the cream where you can reach it.
What is the best type of bag for travelling with a baby?
A backpack-style changing bag is best for travel – it keeps your hands free for the baby, the pushchair, and documents. Look for one with insulated bottle pockets and a fold-out changing mat.
Do I need to bring sterilised water for formula?
For short trips, pre-made formula or ready-to-feed bottles are simplest. For longer journeys, bring sterilised water in a flask (it stays warm for hours) and add formula powder when needed – never make up feeds more than a couple of hours in advance.
Key Takeaways
- Pack one nappy per two hours of travel, plus two to three spares.
- Layer the bag: heavy items at the bottom, nappy-changing supplies on top.
- Baby milk, food, and sterilised water are exempt from the UK 100ml liquid rule.
- Use pouches to group changing, feeding, and medicine supplies.
- Always pack a spare top for yourself – not just for the baby.
