Most airlines will fly a child alone from around age five, through a formal "unaccompanied minor" (UM) service that hands them between airline staff at every stage — check-in, boarding, in-flight care and collection at arrival — for an extra fee. Rules, age bands and exactly what's included vary a good deal by airline, so the details below are a general, hedged guide rather than a substitute for checking the specific carrier's own unaccompanied minor policy before booking.
Typical age bands
Airline policies commonly fall into roughly these bands, though exact ages and terminology differ by carrier:
- Under about 5: most airlines will not carry a child this young without an accompanying adult, regardless of the unaccompanied minor service.
- Around 5–11: the unaccompanied minor service is usually mandatory — the airline requires it and will not let a child this age fly without it, even if a parent requests otherwise.
- Around 12–17: often described as "young passengers" rather than unaccompanied minors, with the service typically optional — parents can choose to book it for extra peace of mind, or let a teenager fly as a standard passenger.
These bands are a general guide rather than a fixed international standard — always confirm the specific airline's own age policy when booking, since some carriers set the mandatory-service cutoff differently, and rules can change.
What the unaccompanied minor service typically includes
- Supervised check-in, usually requiring a parent or guardian to complete paperwork and stay until the child is escorted through security or to the gate.
- An escort onto the aircraft, often boarding before other passengers, with cabin crew informed and typically keeping an eye on the child throughout the flight.
- Supervised deplaning and handover at the destination, released only to the named adult listed on the booking paperwork, who must show identification.
- A dedicated fee, charged per flight or per one-way sector, separate from the ticket price — amounts vary considerably by airline and route, so check the current fee when booking rather than assuming a flat figure.
The collecting adult at the destination will typically need to show identification and, on international flights, may need to complete additional paperwork confirming who they are and their relationship to the child. Confirm exactly what's required well before the flight, since a mismatch or missing document at collection can cause serious delays or complications.
Connecting flights and unaccompanied minors
Many airlines restrict or refuse the unaccompanied minor service on itineraries involving a connection, particularly one with a tight layover, a change of airline, or an overnight gap — since supervising a child through an airport transfer is a materially bigger undertaking than a single direct flight. Where connections are permitted at all, airlines typically require a longer minimum connection time than the airport's general published minimum, precisely because staff need to personally escort the child rather than the child navigating the transfer independently. Direct flights are strongly preferred for unaccompanied minors wherever a realistic direct option exists, and it's worth checking the specific airline's connection policy before booking anything with a change of plane.
Booking the service
- Book well in advance — many airlines cap the number of unaccompanied minors on a given flight, so the service can sell out even if ordinary seats remain.
- Provide the required paperwork, typically including full contact details for the adults dropping off and collecting the child, and sometimes a signed consent or authorisation form.
- Check international document requirements — a child travelling internationally generally needs their own passport, and if only one parent is involved in the booking or travel arrangements, some countries expect a consent letter from the other parent; see our guide to travelling with one parent for how that works.
- Confirm the fee and cancellation policy, since unaccompanied minor bookings sometimes have different change and refund conditions from ordinary tickets.
If the flight is delayed or cancelled once the child is already checked in, the airline's usual delay and cancellation rights still apply, but supervision arrangements for the child during a long wait are worth confirming specifically with the airline rather than assumed.
What to prepare the child with
- A clear luggage tag and ID with contact details for both the sending and receiving adult.
- A charged phone or way to contact someone if the airline permits it, appropriate to the child's age.
- Snacks and something to occupy them, since in-flight service and entertainment can't be relied on to fill the whole journey.
- A copy of the booking confirmation and any paperwork in their bag, in case it's needed again during the journey.
Costs to expect
Beyond the standard ticket price, expect a separate unaccompanied minor fee that can be a meaningful addition to the overall cost, particularly on long-haul or international routes, and particularly where a connection requires extended supervision. Budget airlines in particular sometimes charge proportionally more for this service relative to their base fares than full-service carriers do, so it's worth checking the total cost — ticket plus UM fee — rather than comparing base fares alone when choosing an airline for a child travelling alone. Comprehensive travel insurance covering the child is worth arranging separately, since a UM booking doesn't include any travel cover of its own.
Frequently asked questions
At what age can a child fly alone?
Most airlines allow it from around age five under a mandatory unaccompanied minor service, with the service becoming optional in the young-teenage years and no longer required by around 17–18, though exact ages vary by airline.
Can an unaccompanied minor take a connecting flight?
Sometimes, but many airlines restrict or refuse connections for unaccompanied minors, or require a longer connection time than usual. Direct flights are generally preferred, and it's worth checking the specific airline's policy before booking a connection.
What documents does the collecting adult need?
Typically photo identification, and sometimes additional paperwork confirming their relationship to the child, especially on international flights. Confirm the specific requirement with the airline before the flight.
Does the unaccompanied minor fee apply to every flight in the itinerary?
Usually yes — it's typically charged per flight or per sector, so a connecting itinerary can incur the fee more than once, on top of any connection restrictions that may apply.
Sources and further reading:
- Individual airline unaccompanied minor policy pages for current age bands, fees and connection rules.
- IATA for general background on airline passenger service standards.
- European Commission guidance on travelling with children for entry-document requirements.