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Flying with infants and children: laps, seats, and documents

August 20, 2026 · 9 min read

Flying with infants and children: laps, seats, and documents

Children’s tickets are priced by age on the date of travel, not on the date you search. Airlines define infant (usually under 2), child, and adult differently for international taxes. A lap infant on a domestic US flight is often a small fee or free on the airline; a lap infant on an international ticket still pays taxes and sometimes a percentage of fare. Azurovia search includes infants when you set passenger counts. Policies after that belong to the seller and the airline.

Lap versus bought seat

A lap infant does not get a seat, an overhead bag of their own, or a guaranteed car-seat position. The FAA recommends a ticketed seat and an approved car seat for children. If you buy a seat, you can use a CRS that is labelled for aircraft. Booster seats without a harness usually cannot be used during taxi, takeoff, and landing. Exit rows are off limits with infants.

Turning two mid-trip

If the child turns 2 after the outbound and before the return, many airlines require a child fare on the return. Book that correctly up front or you will be reticketed at the airport.

Documents

Domestic US: children 17 and under typically do not need ID when accompanied, but the airline may still ask for age proof for an infant fare. International: a passport for the child, and likely a consent letter if only one parent is travelling. Destinations can require two parents listed on a visa. That is immigration, not metasearch.

Bassinets and bulkheads

Bassinets are bulkhead inventory, requested from the operating airline after ticketing, never guaranteed, and limited by weight.

Related: unaccompanied minors, seats, passports.