Lap infant is the category used for very young children who travel without occupying their own seat, held on the lap of a responsible adult. Even without a seat, this category has specific rules for documentation, fees, and baggage limits that are worth knowing before you buy your ticket.
Each airline sets its own maximum age considered a lap infant and the exact boarding rules, so the safest approach is always to confirm the details at the time of purchase, providing the child's correct date of birth.
Definition
What counts as a lap infant
Generally speaking, very young infants who haven't yet reached a certain age — usually around two years old, though the exact limit varies by airline — can travel as a lap infant, without occupying an individual seat, staying on the responsible adult's lap for the entire flight. Each adult can usually bring only one lap infant at a time; if there's more than one small child in the family, it's common to need to buy a seat at the child fare for the second one.
At purchase
Lap infant fee and required documents
Since the lap infant doesn't occupy a seat, the fee charged is usually much lower than an adult ticket, but each airline sets its own amount and billing method for this category. At the time of purchase and check-in, you're usually asked for the birth certificate or another document proving the child's age, so it's worth having that document on hand, both digitally and physically, on travel day.
At the airport
What changes at check-in and boarding
Families with a lap infant usually get priority boarding, which helps them get settled calmly before the rest of the passengers. The infant's seat belt is a separate belt that attaches to the adult's belt — it's not allowed to use only the adult's belt while holding the child during takeoff and landing. Strollers can generally be taken to the aircraft door and checked there, to be returned upon deplaning, but it's worth confirming this procedure with the airline before your trip.
What to bring
Baggage allowance for a lap infant
Even without occupying a seat, a lap infant is usually entitled to a reduced baggage allowance, as well as being able to bring essential items like diapers, food, and one comfort item in the cabin, within each airline's specific rules. It's worth confirming this limit before packing, so you're not caught off guard at check-in.
In practice
5 tips for flying with a lap infant with more peace of mind
- 01
Provide the infant's correct age at purchase
This avoids problems at check-in and ensures the fare and rules applied are correct.
- 02
Bring the infant's document on travel day
A birth certificate or equivalent document is usually requested at check-in, so always have a copy available.
- 03
Choose seats with more room, when possible
Rows near the bulkhead or with extra legroom help you settle the infant and baby items more comfortably.
- 04
Breastfeed or bottle-feed during takeoff and landing
Sucking helps the infant equalize ear pressure, reducing discomfort during these parts of the flight.
- 05
Arrive at the airport with extra time
Check-in with a lap infant can take longer because of document checks and priority boarding — build that extra time into your routine.
Common questions
Frequently asked questions
Up to what age is a child considered a lap infant?
The age limit varies by airline, but it's generally close to two years old. It's worth confirming this age when buying the ticket, providing the child's correct date of birth.
Is there a fee for bringing a lap infant on the plane?
Yes, but the amount is usually much lower than an adult ticket, since the infant doesn't occupy their own seat. Each airline sets its own billing method for this category.
What document do I need to bring for the lap infant?
You're usually asked for the birth certificate or another document proving the child's age, both at purchase and at airport check-in. It's recommended to have both a physical and a digital copy available.
Can a lap infant use only the adult's seat belt?
No. Airlines provide a dedicated belt for the lap infant that connects to the responsible adult's belt, and using it is usually mandatory during takeoff, landing, and turbulence.
Can I bring a stroller to the plane?
At most airlines, yes — the stroller can be taken to the aircraft door and checked there, to be returned upon deplaning. It's worth confirming this specific procedure with the airline before your trip.
Who wrote this
Who wrote this
Guta Cunha
Writes about family travel, focusing on practical rules for those traveling with young children.
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