Lap Infant vs Own Seat: Flying With a Baby and a Car Seat

You’re booking holiday flights, and the airline asks a simple question that suddenly feels big: will your baby sit on your lap, or in their own seat? Holding your baby is allowed and costs less, but you’ve also heard that a car seat on the plane is safer. If you’re weighing lap infant vs own seat, here’s what the Federal Aviation Administration (FAA) and the American Academy of Pediatrics (AAP) recommend, how to tell if your car seat can come on board, and a step-by-step plan for travel day.

Quick answer: lap infant vs own seat

Children under 2 are allowed to fly on a parent’s lap, but the FAA strongly discourages it. It recommends an approved child restraint, such as a car seat, in the child’s own seat for the entire flight.
The AAP agrees. It notes that turbulence is the leading cause of children’s injuries on airplanes, and that a baby is safest in their own ticketed seat in an approved restraint.
Check your car seat for this label: “This restraint is certified for use in motor vehicles and aircraft.”
Book a window seat for the car seat if you can, and follow your car seat manual for installing it with the airplane lap belt.
Booster seats can’t be used during the flight, and FAA-approved airplane harnesses are not for infants.
During takeoff and landing, a breastfeed, a bottle or a pacifier can ease ear discomfort, according to the AAP.

Lap infant vs own seat, side by side

	Lap infant	Own seat with car seat
Allowed for babies under 2?	Yes	Yes
What the FAA and AAP recommend	Not recommended	Recommended for the whole flight
Cost	No seat to buy (airline fees and rules vary)	You pay for a seat
During turbulence	Baby is held in your arms	Baby is buckled into their car seat
Space for you	Baby on your lap the whole flight	Your own seat, and a familiar spot for baby to sit or nap
At your destination	You may still need a car seat for the drive	Your car seat is already with you

This isn’t about being a good or bad parent. Many families fly with a lap infant, especially on short flights. The aim of this guide is simply to make the trade-off clear so you can decide with the facts in front of you. For more travel and safety topics, see our baby health and safety guides.

Will my car seat work on the plane?

Find the label. Look on the sides or back of the seat for the words “This restraint is certified for use in motor vehicles and aircraft.” Without it, the seat may not be allowed on board.
Read the airplane section of your manual. It tells you how to install the seat with a lap belt and whether your baby should face backward or forward. The AAP advises following the car seat maker’s instructions.
Check the fit. Not every car seat fits every airplane seat. If your approved car seat doesn’t fit in the seat you paid for, the FAA says the airline is responsible for finding you another seat in the same class of service that fits it.
Know what doesn’t work. Booster seats can’t be used on airplanes during flight. FAA-approved harnesses are designed only for planes and, according to the AAP, are not for infants; they are meant for children roughly 22 to 44 pounds.

Your travel day plan

When you book

Decide on lap or own seat, and check your airline’s rules for both.
If you’re buying a seat, choose a window seat. The AAP suggests a window seat when possible, because aisle seats carry more risk of burns from hot drinks and of falling items.
Look for rows with more space, such as the front row or bulkhead. Some airlines offer bassinets, which the AAP notes usually require babies to be under 6 months old or 20 pounds.

At the airport

If you’re not using the car seat on board, you may be able to check it at the gate. The AAP says this is usually free and can help avoid damage, but confirm with your airline first.
Pack feeding supplies, a change of clothes and a few diapers in your carry-on. Our list of travel diapering essentials and tips for feeding your baby on the go can help you pack.

On board

Install the car seat as your manual describes, buckle your baby in, and keep them buckled whenever the seat belt sign is on.
Offer a breastfeed, bottle or pacifier during takeoff and landing. The AAP says this can ease discomfort from changes in air pressure.
Dress your baby in thin layers, as you would in the car. Planes can be warm or chilly, and thin layers are easy to adjust. The same rule as in the car applies: no bulky coat under the straps. See how to keep baby warm in a car seat.

After you land

Your baby still needs a car seat for every car ride at your destination, including taxis and rental cars. Having your own seat with you makes that easier.
Expect some disruption to naps and nights. Our baby travel sleep tips help you get back on track.

If you choose to fly with a lap infant

The FAA allows it, and many parents do it. A few things can help:

Ask at check-in or at the gate whether there’s an open seat. Some airlines may let you use it for your baby and an approved car seat if the flight isn’t full. Policies vary, so ask rather than assume.
Keep your baby out of the aisle, and keep hot drinks out of reach.
If you check your car seat, consider checking it at the gate rather than with your luggage, which the AAP says can help avoid damage.

How young is too young to fly?

The AAP says it’s generally safe for a healthy newborn to fly once they’re at least 7 days old, but suggests waiting until your baby is 2 to 3 months old if you can. The main reason is that crowded airports and air travel can raise a newborn’s risk of picking up an infection.

When to talk to your doctor

Before flying with a baby under 2 to 3 months old, especially if they were born premature or have a health condition.
If your baby has had an ear infection or ear surgery in the 2 weeks before the trip. The AAP advises asking your pediatrician if it’s OK to fly. Read more about ear infections in babies.
If your baby under 3 months has a temperature of 100.4°F or higher before or during your trip, call your pediatrician right away. Our guide on baby fever explains what to watch for at every age.
If your baby seems to have ear pain that doesn’t settle after the flight, or you notice fluid coming from the ear.
Call 911 or ask the flight crew for help right away if your baby has trouble breathing.

Frequently asked questions

Can a baby fly on my lap?

Yes. Children under 2 are allowed to fly as lap children. The FAA strongly discourages it, though, and recommends an approved car seat in the child’s own seat for the entire flight.

Do I need to buy my baby a plane seat?

It isn’t required for children under 2, but both the FAA and the AAP recommend it as the safest option. Check your airline’s fares and rules before you book.

Can I use my infant car seat on the plane?

Often, yes, if it has the label “This restraint is certified for use in motor vehicles and aircraft.” Check your manual for how to install it with an airplane lap belt.

Can I use a booster seat or travel harness instead?

Not for a baby. Booster seats can’t be used during flight, and FAA-approved airplane harnesses are not for infants.

How can I help my baby’s ears on the plane?

Offer a breastfeed, a bottle or a pacifier during takeoff and landing. The AAP says this can ease discomfort from the changes in air pressure.

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Sources

This article is for general information only and is not a substitute for medical or car seat safety advice. Always follow your car seat manual and your airline’s rules, and ask your pediatrician if you have questions about flying with your baby.