Flying with a baby: car seats, milk and airport essentials

Start with the flight, not the suitcase

Before buying tickets, check the airline's policies for your baby's age, travel documents, seating and baggage. Rules differ by airline and route. Decide whether you will purchase a separate seat and bring an approved child restraint, then plan the car journey at the other end. This guide covers US FAA and TSA guidance; other countries have different requirements.

Can you use a car seat on an airplane?

The FAA says the safest place for a child under two is in an approved child restraint system, rather than on an adult's lap, and strongly recommends using an approved restraint. It does not require child restraints on commercial flights. A purchased ticket for your child guarantees a seat for the restraint.

Check the seat's label certifying use in motor vehicles and aircraft, and follow its instructions and your child's height and weight limits. Confirm with the airline that the model fits its seating arrangements and where it can be installed. A car seat suitable for a vehicle is not automatically approved for aircraft; verify the actual label and model rather than relying on a product category.

Can you bring milk and formula through TSA?

TSA allows breast milk, formula, toddler drinks and baby or toddler food, including purées, in carry-on quantities above 3.4 ounces (100 milliliters). They do not need to fit the quart-size liquids bag. Tell the officer at the start of screening and remove these items for separate screening. Additional screening may be required.

Cooling packs are permitted, and the child does not have to be traveling with you for these supplies. Review the linked TSA guidance before travel, especially if you have screening concerns or use specialist feeding equipment. Do not apply these exceptions to every other liquid in your bag.

Pack a reachable journey kit

Keep essential feeding supplies, diapers, wipes, a changing mat and changes of clothes in a bag you can reach. Include a spare top for yourself and a buffer of your child's usual supplies for delays. Carry travel documents and necessary medication with you rather than relying on checked luggage. Tailor quantities to your child's routine and journey; there is no universal packing count for every baby.

Plan the stroller handoff

Ask the airline about stroller allowance, gate checking, collection location and any size or weight restrictions. Policies vary, so do not assume your stroller will be returned at the aircraft door. Think through how you will carry your baby and bags between the plane and baggage collection if it is not.

Airport-to-hotel transport still needs a plan

A car seat arranged at your hotel does not cover the drive from the airport. Confirm that an appropriate seat will be available before that first journey, or bring your own suitable seat. If arranging a rental, ask for the exact model, history, expiration information, recall checks and installation instructions. Never choose solely from your child's age or a sample photo.

Before departure

Recheck airline and security policies and save your confirmed accommodation and transport details. Renting bulky gear can reduce luggage only when the item, dates and handoff are actually confirmed. Packless Baby requests are not instant bookings. Official guidance and manufacturer instructions take priority over this planning checklist; seek qualified help for individual restraint or medical questions.