Flying With an Infant Internationally: Seats, Passports and Practical Tips

Flying with an infant internationally is very doable, but it rewards planning. Long flights, security checks, time zones and passport rules all work differently when a baby or young child is travelling with you.

The decisions that matter most are made before you book: whether your baby sits on your lap or in their own seat, whether you can get a bassinet, and whether every child has the right documents. The rest is about packing and pacing on the day.

Airline rules differ, and entry rules depend on nationality, so check your airline and official sources for your own trip.

1. Lap Infant or Own Seat

Most airlines let children under two travel on an adult's lap, usually for a reduced fare on international flights that may include taxes. Once a child turns two, they need their own seat.

• A lap infant is cheaper but means holding your baby for the whole flight.
• Usually only one lap infant is allowed per adult.
• A paid seat lets you use an approved child car seat, which the FAA recommends as the safest option.
• Check whether your car seat is approved for aircraft use and fits the airline's seats.
• If your child turns two during the trip, check how the airline handles the return flight.

2. Request a Bassinet Early

Many long-haul aircraft have bassinet positions, usually at bulkhead seats. They are limited and given on request.

• Request a bassinet as soon as you book, through the airline.
• Check the weight and size limits, which differ by airline.
• Bassinets usually cannot be used during take-off, landing and turbulence.
• A request is not a guarantee, so be ready to hold your baby if needed.

3. Passports for Children

Every child, including a newborn, needs their own passport for international travel.

• In the US, a passport for a child under 16 generally requires both parents' or guardians' consent, and the child must appear in person.
• Children's passports are often valid for a shorter period than adults'. US passports for children under 16 are valid for five years.
• Check the validity rules of your destination, which may require several months beyond your stay.
• Children may also need their own visa or travel authorisation.

Apply early, because getting both parents' consent and an appointment can take time.

4. Consent Letters When One Parent Travels

If a child travels with only one parent, or with someone else, border officers or airlines may ask for proof of permission.

• Carry a signed consent letter from the parent who is not travelling, with their contact details.
• Some travellers have the letter notarised.
• Bring a copy of the child's birth certificate if your surnames differ.
• Bring custody or guardianship documents if relevant.
• Some countries have specific requirements, so check official guidance for your destination.

5. Strollers and Car Seats

Most airlines carry strollers and car seats for free, but the details vary.

• Many airlines let you use a stroller to the gate and collect it at the aircraft door or at baggage claim.
• Small folding strollers may be allowed in the cabin on some airlines.
• Car seats can often be checked free of charge.
• Use a protective bag and label everything.
• If you will rent a car, plan the child seat. Our airport car rental tips explain how to arrange one.

6. Infant Baggage Allowance

Baggage rules for infants are not standard.

• Lap infants may have a small checked or cabin allowance, or none at all.
• Children with their own seat usually get a normal allowance.
• A nappy bag may be allowed in addition to your hand luggage.
• Check the rules for every airline on your itinerary, especially with connections on different airlines.

7. Feeding and Security Liquids

Security rules make exceptions for babies. In the US, TSA allows formula, breast milk, juice and baby food in reasonable quantities in your carry-on, even above the usual liquid limit.

• Tell the security officer at the start of screening.
• Keep these items separate so they can be screened easily.
• Ice packs for breast milk are generally allowed.
• Rules outside the US are similar in many places but not identical, so check the airport's guidance.
• Bring more food than you think you need in case of delays.

8. Ear Pressure, Sleep and Comfort

Changes in cabin pressure during take-off and landing can be uncomfortable for small ears.

• Feeding, a bottle or a dummy during descent can help babies swallow and equalise pressure.
• Older children can drink or chew if age-appropriate.
• Bring layers, as cabin temperatures vary.
• Pack spare clothes for your child and a spare top for yourself.
• Try to keep familiar routines around sleep times.

9. Plan Connections Carefully

Everything takes longer with children.

• Choose longer connections than you would alone.
• Check whether your stroller is returned at the gate or at baggage claim during connections.
• Find family facilities, changing rooms and quiet areas at the connecting airport.
• Check transit visa rules for every family member.

See how much layover time you need to plan realistic connections.

Common Mistakes When Flying With Children

• Not adding the infant to the booking from the start.
• Requesting a bassinet too late.
• Forgetting the consent letter when one parent travels alone.
• Assuming the child's passport has the same validity as yours.
• Packing baby food in checked luggage.
• Booking tight connections.
• Bringing too few nappies and spare clothes.

Frequently Asked Questions

Can a baby fly on my lap on an international flight?

Most airlines allow children under two to travel on an adult's lap, usually for a reduced fare that may include taxes. Only one lap infant is normally allowed per adult.

How do I get a bassinet on a plane?

Request it from the airline as soon as you book. Bassinets are limited, have weight and size limits, and are not guaranteed.

Does my baby need a passport?

Yes. Every child, including newborns, needs their own passport for international travel, and may need a visa or travel authorisation too.

Can I bring baby food and formula through airport security?

In the US, TSA allows formula, breast milk and baby food in reasonable quantities in your carry-on. Tell the officer at the start of screening.

Do I need a consent letter if I travel alone with my child?

It is strongly recommended. Border officers or airlines may ask for proof that the other parent agrees to the trip, and some countries have specific requirements.

Plan Your Family Trip with FlyZafy

On FlyZafy you can search flights and see the full itinerary, layovers, baggage and fare conditions before you book, which helps when choosing family-friendly connections. Request bassinets and special assistance directly with the airline after booking.

Use our international travel checklist to make sure every family member's documents are ready.

Official Resources

• TSA, travelling with children
• FAA, Federal Aviation Administration
• US Department of State, passports and travel information
• IATA

Disclaimer

This article is general information, not legal or immigration advice. Airline policies, security rules and entry requirements for children vary by airline, country and nationality, and they change. Always confirm the current rules with your airline and the official authorities of every country on your itinerary before you travel.