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Flying With a Baby: Car Seats, Security, Ears and Sleep

How to fly and travel with a baby: seats and car seats, documents, milk through security, ears, and safe sleep away.

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3 min read Checked against AAP and CDC guidance - Updated November 2026

TLDRThe short version, if you only have a minute

  • The safest way to fly is a ticketed seat with an FAA-approved car seat; many pediatricians suggest waiting until 2-3 months.
  • Breast milk and formula are allowed through security above the liquid limit. Nurse, bottle or pacifier during takeoff and landing.
  • Safe sleep travels with you: a play yard with its own flat mattress, not an adult bed. Use a car seat in every car.

Before you book

  • Many pediatricians suggest waiting until about 2 to 3 months, when vaccines have started, though healthy full-term babies can often fly earlier; ask your pediatrician. For the first weeks, see the first month outings guide.
  • A seat for your baby is safest. Children under 2 may fly on a lap, but in turbulence a lap baby can be thrown. The FAA recommends a ticketed seat with an approved car seat.
  • Check the car seat label: it should say it is certified for motor vehicles and aircraft. Measure its width; most fit a standard economy seat. Airlines usually require it in a window seat.
  • Book flights around naps or night sleep if your baby sleeps well on the go, and choose nonstop when you can.

Documents

  • Babies need their own passport for international travel. For US children under 16, both parents usually must consent to the application.
  • If one parent travels alone with a child, especially abroad, carry a signed consent letter from the other parent or custody papers. Co-parents, carry your parenting plan.

At the airport

  • Milk and food: breast milk, formula, juice and baby food are allowed in carry-ons in reasonable amounts above the usual liquid limit. Tell the security officer at the start. Ice packs are allowed.
  • Gate-check a stroller; a carrier keeps hands free through security.
  • Arrive early and let your baby crawl or stretch before boarding.

On the plane

  • Ear pressure: offer the breast, a bottle or a pacifier during takeoff and especially landing. Swallowing helps. A baby who cries during descent is also equalizing pressure.
  • Diaper bag: twice the diapers you think, wipes, two changes of clothes for baby and one top for you, bibs, a blanket, snacks if eating solids, any medicines, and a few small new toys.
  • Change diapers right before boarding.
  • Walk the aisle when the seatbelt sign is off. Expect some crying; most passengers understand.
  • A sick baby with a cold or ear infection may have more ear pain. Ask your pediatrician first.

When you arrive

  • Safe sleep travels with you. Bring or reserve a portable crib or play yard with its own flat, firm mattress and fitted sheet only. Not an adult bed, sofa, car seat or pillow nest. See the safe sleep guide.
  • Car seats in every car, including taxis, rideshares and rentals. Bring your own or reserve one you can check.
  • Babyproof the room quickly: cords, outlets, medicines, balconies, and the bathroom.
  • Time zones: shift meals, naps and light to the new time on arrival. Most babies adjust within a few days.
  • Pack a basic travel health kit, and know the local emergency number. For trips with a child over 1, see the car trips and flying with toddlers guide.

When to check in

  • Ask your pediatrician before travel for a baby under 3 months, a preemie, or a baby with heart or lung problems, and whether vaccines need updating for your destination.
  • If your baby has trouble breathing, turns blue, or is very hard to wake, use the local emergency number (911 in the US).

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Grounded in: FAA guidance on child restraint systems on airplanes, TSA guidance on traveling with breast milk, formula and baby food, AAP HealthyChildren guidance on air travel, car seats and safe sleep, and US State Department passport rules for children. Summarized in Cradle's own words; none of these sources endorse Cradle. General information.

General information, not medical advice. If something feels wrong, trust that and call your pediatrician or provider. See Sources.

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