How Do You Fly With a Baby?
To fly with a baby, book a flight that fits their sleep schedule, decide early between a lap seat and a paid seat with an FAA-approved car seat, and pack a carry-on built around feeding, diapers, and one change of clothes. On board, feed or offer a pacifier during takeoff and especially descent, change diapers before boarding, and expect the day to run slower than planned.
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When to Book
Book early and pick the flight around your baby’s sleep, not the cheapest departure time. An early-morning or nap-time flight often works for babies under 1, who sleep easily in a moving, humming space. For long-haul trips, an overnight flight can line up with their longest stretch of sleep.
Book as soon as your dates are firm. Bassinet positions and seats together go first. Many US airlines have committed to fee-free adjacent seating for a child 13 and under with an accompanying adult, but conditions apply, so select seats at booking and check your airline’s family seating policy.
Nonstop flights are worth paying a bit more for. Every connection adds a boarding, a security check or gate change, and another descent for small ears. If you must connect, leave at least 90 minutes so a diaper change or feed does not turn into a sprint.
A baby’s age at travel matters too. A lap infant must be under 2 on every flight, including the return. If your baby turns 2 mid-trip, you will need to buy a seat for the return leg.
Lap Infant vs Own Seat
A lap infant flies free on US domestic flights and usually for about 10% of the adult fare plus taxes on international flights, while a paid seat costs more but is the safer choice. The FAA strongly recommends that a child under 40 lb (18 kg) ride in an approved child restraint in their own seat. One lap infant is allowed per adult.
| Factor | Lap infant | Own seat with car seat |
|---|---|---|
| Cost | Free domestic (taxes may apply); about 10% of adult fare international | Full or discounted fare, depending on airline |
| Safety | Held in your arms; no restraint in turbulence | FAA-recommended; baby strapped into an approved restraint |
| Space | You share one seat for the whole flight | Your own seat plus the baby’s |
| Sleep | Baby sleeps on you; you rarely sleep | Many babies sleep well in a familiar car seat |
| Works best for | Short domestic flights, tight budgets, babies who nap on a parent | Long flights, babies used to napping in their car seat, safety-first families |
If you buy a seat and bring a car seat labeled “This restraint is certified for use in motor vehicles and aircraft,” US airlines must let you use it. It usually goes in a window seat and never in an exit row. Our guide to car seats on airplanes covers installation, width limits, and what to do if the crew pushes back.
Bassinets on Long-Haul Flights
A bassinet is a small cot that clips onto the wall in front of a bulkhead row, and it is the best way to get sleep on a long-haul flight with a lap infant. Most airlines offer them on wide-body international aircraft, not on short domestic routes.
Weight and size limits vary by airline. Many cap them somewhere around 20–25 lb (9–11 kg) and a certain length, and some limit them by age. Check your airline’s limits before relying on one, and request the bassinet at booking, then confirm it by phone.
Bassinets are usually first come, first served, and you cannot keep your baby in it during takeoff, landing, or turbulence. Expect to lift a sleeping baby out when the seat belt sign comes on. The bulkhead row also means no under-seat storage, so keep a small bag of essentials in the seat pocket or at your feet after takeoff.
What to Bring On Board
Pack your carry-on for the flight time plus a delay of at least 3 hours. That usually means:
- Diapers: 1 per hour of travel, plus a few extra
- Wipes, a changing pad, and small bags for dirty diapers
- Formula, breast milk, or baby food for the full day, plus extra
- Bottles or a nursing cover, and a pacifier with a spare
- One full change of clothes for the baby, and a spare shirt for you
- A light blanket or swaddle, because cabins get cold
- 2–3 small, quiet toys and a teether
- Any medication your pediatrician has told you to carry
Use our printable baby packing list to check the rest, or build a custom list with the packing list generator.
Security With Formula and Breast Milk
TSA allows formula, breast milk, juice, and baby food in reasonable quantities above 3.4 oz (100 ml), as long as you declare them at the checkpoint. Take them out of your bag and tell the officer before screening starts. Ice packs and gel packs to keep milk cold are allowed too.
Officers may test the liquids. You can ask that they not be X-rayed or opened, but that may mean extra screening, so build in time. Rules can change, so check TSA.gov before you fly.
Babies do not need ID for domestic flights when traveling with an adult, though your airline may ask for a birth certificate for a lap infant. Every international trip needs a passport for the baby. See travel documents for children for what to bring and how early to apply.
Stroller and Car Seat Gate Check
Most US airlines check a stroller and a car seat free, either at the counter or at the gate, and they do not count toward your bag allowance. Gate-checking the stroller is usually the better choice. You keep it through the airport, and it doubles as a luggage cart.
Ask for gate-check tags at the counter or the gate desk before boarding. Fold the stroller at the jet bridge door. On arrival, it is often waiting at the aircraft door, but on some flights it comes out at baggage claim, so carry a baby carrier as a backup.
Ears on Takeoff and Landing
Swallowing helps a baby’s ears adjust to pressure changes, so feed or offer a pacifier during takeoff and especially during descent. Descent is usually harder on ears than takeoff. It starts about 20–30 minutes before landing, well before the wheels come down.
Crying may also help the ears equalize, so a crying baby during descent is not necessarily a baby in pain. If your baby has a cold, congestion, or an ear infection, ask your pediatrician before flying.
Feeding Around Takeoff and Descent
Time feeds so your baby is hungry at takeoff and at the start of descent. Avoid a big feed right at the gate if boarding runs long. Instead, offer a small snack at the gate and save the main feed until the plane starts moving.
Ask a flight attendant when descent will start, since the captain’s announcement often comes late. Save half a bottle or a nursing session for that window. If your baby falls asleep before descent, you do not need to wake them.
Crew can usually give you hot water to warm a bottle. Bring powder formula premeasured into a dispenser for easy mixing, plus a bottle of water from a shop past security.
Diaper Changes in Flight
Change your baby’s diaper right before boarding, because airplane changing tables are small and not in every lavatory. On most larger aircraft, at least one lavatory has a fold-down table. Ask a flight attendant which one when you board.
Bring only what you need into the lavatory: 1 diaper, wipes, a changing pad, and a bag.
Sleep on Board
Babies sleep best on a plane when you recreate their usual routine: the same sleep sack or swaddle, the same white noise, and the same feeding pattern before sleep. A lightweight cover over the car seat can dim the light, but never cover it fully or block airflow.
Keep expectations low. Babies may sleep more than usual on a plane, or much less. Do not give any medication to make a baby sleep. If sleep is a real worry, talk to your pediatrician before the trip.
Landing and Arrival
Stay seated until most passengers have left the aircraft. You will need time to collect bags, the car seat, and the baby, and the stroller may take a few minutes to arrive at the door.
Plan a quiet first evening. A feed, a bath, and an early night will help reset your baby after the flight. For trips across time zones, see our guide to jet lag in children to shift sleep before and after the trip.
Once your baby starts walking, flying changes again. Read flying with a toddler when the time comes, and see Traveling with Children: The Complete Guide for the rest of the trip.
Frequently asked questions
How old does a baby have to be to fly?
The American Academy of Pediatrics suggests waiting until 2 to 3 months when you can, and says flying is generally safe for healthy newborns from about 7 days old. Airlines set their own minimum age, often a few days to 2 weeks, sometimes with a medical note for the youngest. Check with your airline and ask your pediatrician, especially for a premature baby or any health concern.
Does a lap infant need a ticket?
A lap infant under 2 flies free on US domestic flights, though taxes or fees may apply. On international flights, lap infants usually pay about 10% of the adult fare plus taxes. Either way, you must add the baby to your reservation and you will get a boarding pass or infant ticket for them.
Does my baby need ID or a passport to fly?
TSA does not require ID for travelers under 18 on domestic flights when they fly with an adult. Airlines may still ask for proof of age for a lap infant, so carry a birth certificate or a copy. Every international flight requires a passport for the baby, no matter how young.
Can I bring formula and breast milk through security?
Yes. Formula, breast milk, and baby food are allowed in reasonable quantities above 3.4 oz (100 ml). Take them out of your bag and tell the officer before screening starts. They may be tested, but you can ask that they not be X-rayed or opened, which may lead to extra screening.
How do I protect my baby's ears on a plane?
Swallowing helps equalize ear pressure, so feed your baby or offer a pacifier during takeoff and especially during descent. Descent is usually harder on ears than takeoff. If your baby has a cold or an ear infection, ask your pediatrician whether flying is a good idea.
Is it safe to fly with a baby on your lap?
Lap travel is legal for children under 2, but the FAA says the safest place for a child on a plane is an approved child restraint in their own seat. Turbulence can happen without warning, and adult arms cannot reliably hold a baby. If a paid seat fits your budget, it is the safer option.
Does a 2-month-old baby need a flight ticket?
Not a paid seat if they fly on your lap. A 2-month-old can travel as a lap infant: free on US domestic flights (taxes may apply) and usually about 10% of the adult fare plus taxes on international flights. You still have to add the baby to your booking, and you can buy a seat if you want to use an FAA-approved car seat, which the FAA recommends.