Is it safe to fly with my baby?

The verdict

Flying with a baby is safe. The American Academy of Pediatrics puts it as directly as anyone: it is generally safe to fly when your newborn is at least seven days old, and ideally you will want to wait until your baby is two to three months old. Those are two different statements and it is worth keeping them apart. Seven days is the floor. Two to three months is the preference.

The reason for the preference is not the aircraft. It is the airport. The AAP notes that air travel, and being in crowded airports, can increase a newborn's risk of catching something, and advises delaying travel for a few weeks where possible to protect an infant from colds, flu and other diseases. A newborn who picks up a fever needs to be seen, investigated and often admitted, in a way an older baby with the same virus does not.

Cabin pressure, ears and oxygen

Healthy full-term babies handle cabin pressure without difficulty. A pressurised cabin sits at an equivalent altitude well below the point at which a healthy infant runs into trouble, which is why no authority sets an oxygen-related restriction for ordinary babies.

Ear pain on descent is real but manageable. The middle ear equalises through the Eustachian tube, and swallowing opens it. A feed - breast, bottle or a dummy - timed for the descent rather than for take-off is the practical answer, because descent is when the pressure differential works against the eardrum.

A baby with an active ear infection or a heavy cold is a different case. Congestion blocks the tube that has to do the equalising, and that is where genuine pain comes from. If your baby is unwell in the days before a flight, get them checked rather than guessing.

Preterm babies and babies with heart or lung conditions need individual advice. The UK Civil Aviation Authority publishes guidance for health professionals on babies and young children precisely because these cases are not covered by a general rule, and airlines may ask for a fitness-to-fly letter.

Lap infants: the honest answer

Every major aviation authority allows babies under two to travel on an adult's lap, and every paediatric body says it is the less safe option.

The AAP's position is that the answer to whether a baby should sit on your lap is no. The physics is the problem: in severe turbulence or a survivable impact, an adult cannot hold onto a baby, and the forces involved are far beyond what arms can resist. A baby in an approved child restraint - the same car seat you use in the car, if it is certified for aircraft use - is restrained by the aircraft, not by you.

That requires buying a seat, which is the reason most families do not do it. It is worth knowing that this is a cost decision and not a safety-neutral one, and worth knowing before you make it.

Bassinets and lie-flat options

Many long-haul aircraft carry bulkhead bassinets. The AAP notes that most airlines offering them require babies to be under six months old or 20 pounds and not yet able to sit up on their own, and that bassinets must be requested in advance because bulkhead rows are limited. Safe sleep rules do not stop at the aircraft door: if your baby sleeps in a bassinet in flight, the surface should be firm and flat with no blankets, pillows or soft toys, and your baby will need to be taken out and held or restrained for take-off, turbulence and landing.

The paperwork nobody expects

A baby needs their own passport for international travel. In the UK this is a full child passport in the baby's own name, valid for five years, applied for through GOV.UK - a baby cannot travel on a parent's document. Allow more time than you think; a first child passport is not a same-week process.

Airlines set their own minimum age for carriage and they do not agree with each other. Some accept babies from 48 hours, some from seven days, some from two weeks. Some require a doctor's letter under a certain age. Check your specific airline's conditions of carriage rather than a general rule, and check it again if you rebook.

The car seat at the other end

The trip does not end at arrivals. If you are hiring a car, the child restraint rules of the destination apply, not the ones you know from home, and hire-company seats vary enormously in condition and in whether anyone can show you how to fit it. Taking your own seat, where the airline carries it free as baby equipment, sidesteps both problems and gives you an aircraft-approved restraint for the flight itself.

Noise

Cabin noise on a jet is loud but sustained rather than peaking, and no authority recommends ear defenders as a routine measure for flying. Small ear muffs are widely sold for the purpose and are not harmful, but if you use them, choose ones sized for an infant head and do not use earplugs, which are a choking hazard in this age group.

Where guidance differs

The medical advice is broadly consistent internationally. The regulation is not.

In the United States the Federal Aviation Administration does not require a ticket for a child under two, which is why airlines cannot refuse a lap infant, and the AAP's advice to buy a seat is a recommendation rather than a rule. In the UK the Civil Aviation Authority leaves minimum-age decisions to individual airlines and publishes guidance aimed at clinicians assessing whether a particular baby is fit to fly. Australia's Raising Children Network approaches the subject as a practical travel problem - bassinet booking, feeding on descent, what to pack - rather than as a safety threshold.

The one thing that is the same everywhere: a lap infant is legal, and a restrained infant is safer.