Can babies travel without a passport?

The verdict

No, not for international travel. A baby needs their own passport, in their own name, from their first flight abroad.

The belief that a child can be added to a parent's passport is common and out of date by decades. It has not been possible in the UK, Ireland or comparable countries for a very long time, and every child of any age – including a newborn a week old – travels on a document of their own.

What a child passport is

In the UK, you apply for a child passport through GOV.UK. It is a full passport in the child's name with their own photograph, and it works exactly as an adult passport does at a border.

The main difference is validity. A UK child passport is issued for five years, not ten. That has two consequences people rarely think about at the time. First, a passport obtained for a newborn expires while the child is still small. Second, and more expensively, the photograph is of a baby, and by the time the passport is three years old it bears very little resemblance to the child holding it – which is normal and accepted, but frequently prompts a second look.

Ireland issues children's passports on the same basis, through a separate children's application route with its own consent and documentation requirements, and with a shorter validity than an adult passport.

The photograph

Getting a compliant photograph of a newborn is the part everybody underestimates. The requirements are the standard passport ones with allowances made for very young children, but the baby still has to be alone in the frame, eyes open where possible, with a plain background and no shadows and no hands supporting the head.

The usual method is to lay the baby on their back on a plain white sheet and photograph from directly above. Photo booths do not work for this. Many pharmacies and photo shops will do it and know the rules.

Allow far more time than you think

This is the practical failure that ruins holidays.

A first child passport is not a same-week process. It requires supporting documents including the child's full birth certificate, a countersignatory who has known the parent for a qualifying period, and processing time that runs to several weeks in normal conditions and considerably longer at peak times.

Apply as soon as you know you will travel, and before you book anything non-refundable. Do not send the application in expecting to be able to chase it into an existing booking.

Check the expiry against the destination's rules

Many countries require a passport to have a period of validity remaining beyond the date of travel – commonly three or six months, and sometimes calculated from the date of entry rather than departure. A child passport that expires in four months may be refused for a trip next week.

GOV.UK publishes foreign travel advice by country, including entry requirements, and that is the authoritative place to check for the specific destination rather than relying on general rules.

Domestic travel: the only place it loosens

For flights within the UK there is no legal passport requirement, and this is where the answer becomes "it depends on the airline".

The rules that apply are the carrier's own conditions of carriage rather than statute. Some airlines require photographic identification for adults and accept a birth certificate, or nothing, for an infant. Others ask for a passport for every passenger regardless of age. Some ask for proof of age for infants travelling free on a lap.

The UK Civil Aviation Authority's consistent advice to passengers travelling with children is to check the specific airline's conditions rather than assume a general rule, and to check again if you rebook, because these terms change.

The Common Travel Area between the UK and Ireland means passport control is not routinely operated on those routes, but carriers still set identification requirements and will usually ask for a passport in practice.

Trains, buses, ferries within a country and car travel domestically need nothing for a baby.

The other documents worth having

The birth certificate. Useful for a domestic flight where the airline asks for proof of age, and useful generally when a surname does not match.

A consent letter if you are travelling alone with your child. This is not a UK legal requirement for leaving the country, but border officials in a number of destinations ask for evidence that the other parent consents, particularly where the child's surname differs from the accompanying adult's. A signed letter from the other parent with their contact details, alongside the child's birth certificate, resolves it quickly. Check the destination's entry requirements before you go.

Health cover. Travel insurance that names the baby, and any reciprocal healthcare arrangement that applies to your destination, obtained in the child's own name.

Vaccination records, where a destination requires them.

Airlines have their own age rules, separately

Having a passport is not the same as being allowed on the aircraft. Airlines set their own minimum ages for carrying a newborn, and they do not agree with each other – some accept babies from a few days old, some from a week or two, and some require a doctor's letter under a certain age.

That is a separate check from the passport, and it is also in the conditions of carriage rather than in any regulation.

Where guidance genuinely differs

International travel: no country lets a baby travel on a parent's passport. The rule is uniform, and the only thing that varies is validity period and application process.

Domestic travel: the rules are contractual, not legal. Within the UK there is no statutory requirement for a baby to carry identification on a domestic flight, but individual airlines impose their own. This is the one place where checking your specific carrier genuinely matters rather than being a formality.

Validity periods differ by country. The UK issues child passports for five years. Other countries use different periods, and a family holding passports from more than one country may find they expire on different schedules.

Entry requirements are set by the destination, not your home country. Remaining-validity rules, consent letters for single-parent travel and visa requirements all come from the country you are entering, which is why the country-by-country advice matters more than any general rule.