The FAA does not approve or certify car seats — it sets rules for which ones you can use in flight

The Federal Aviation Administration does not have an approval process for car seats. Instead, the FAA maintains a list of requirements that a car seat must meet to be legal to use on an aircraft. Any car seat that meets those requirements can be used; the FAA does not pre-screen or endorse specific models. This distinction matters because you will not find an "FAA-approved" label on any car seat — what you will find is a car seat that complies with FAA rules.

The core requirement is that the car seat must be approved by the National Highway Traffic Safety Administration (NHTSA) for use in motor vehicles. If a car seat has an NHTSA label and meets the FAA's size and installation rules, it can be used on a plane. The FAA's role is to set the boundaries; manufacturers and retailers handle the certification that happens before a seat ever reaches you.

Key Takeaways

  • Any car seat with an NHTSA label that fits in an airplane seat and can be secured with a seat belt meets FAA requirements — no separate FAA approval exists.
  • The car seat must be installed using only the airplane seat belt, not the LATCH system, because airplane seats do not have LATCH anchors.
  • The seat must fit within the width of an airplane seat (typically 17 to 18 inches) and must not block the aisle or emergency exits.
  • You will need to purchase a separate ticket for the child to have a seat for the car seat, since it cannot be used on a lap or in a bassinet.

How the FAA's car seat rules actually work

The FAA allows car seats on planes under Federal Aviation Regulation Part 91.107(a)(3). The regulation does not name specific approved models. Instead, it says a car seat is legal if it meets three conditions: it must be NHTSA-certified for motor vehicle use, it must be installed using the airplane seat belt, and it must not obstruct emergency exits or the aisle.

This means the FAA's job is to set the framework, not to test individual seats. NHTSA does the actual certification work when a manufacturer designs a car seat for road use. If that seat happens to fit in an airplane seat and can be secured with a lap belt, it automatically meets FAA rules. You do not need to check a separate FAA database or look for a special FAA sticker.

The practical result is that most modern infant car seats and some convertible seats will work on planes, but you need to verify the dimensions yourself. Airlines do not pre-screen seats, and the FAA does not maintain a list of approved models. You check the seat's width and depth against your airline's seat dimensions, and you confirm the seat has an NHTSA label.

Size and installation requirements that actually matter

An airplane seat is narrower than a car seat, so not every car seat fits. Most airplane seats are between 17 and 18 inches wide. Infant car seats typically range from 16 to 18 inches wide, so many fit, but some do not. Convertible car seats are often 19 to 20 inches wide and usually do not fit in a standard airplane seat. You must measure your specific car seat and compare it to your airline's seat width before you book.

Installation on a plane is different from installation in a car. You cannot use the LATCH system because airplane seats do not have LATCH anchors. Instead, you thread the airplane seat belt through the car seat's belt path and find it the same way you would with a lap belt in a vehicle. The seat belt must be tight enough that the car seat does not move more than an inch side to side or front to back. Some car seats are easier to install this way than others, so test yours at home before your flight.

The car seat cannot block the aisle, emergency exits, or overhead bins. If the seat extends into the aisle or makes it impossible for passengers to exit in an emergency, the flight attendant will ask you to remove it. This is less common with infant seats and more common with larger convertible seats, but it is a real possibility on smaller aircraft or in rows near emergency exits.

What to do before you fly with a car seat

Contact your airline before you book to confirm their specific seat width and to ask whether they have any additional policies. Some airlines have restrictions on which rows allow car seats, or they may require advance notice. A few airlines have their own lists of tested car seats, though these are not FAA requirements — they are the airline's own policy. Getting this information early prevents surprises at the gate.

Measure your car seat's width, depth, and height. Compare these measurements to your airline's seat dimensions. If your seat is wider than the airplane seat, it will not fit. If you are unsure, contact the car seat manufacturer and ask for the exact width — do not estimate.

Practice installing the car seat using only the airplane seat belt before your flight. Sit in a regular chair at home, thread a belt through the car seat's belt path, and tighten it. This is how it will work on the plane. If you cannot get it tight enough or the seat moves too much, the flight attendant may not allow it.

Infant seats versus convertible seats on planes

Infant car seats (rear-facing, typically for children from birth to 30 pounds) are the most common choice for air travel. They are narrower than convertible seats, fit in most airplane seats, and are easier to install with a lap belt. If you are flying with a baby, an infant seat is usually your best option if you want to use a car seat at all.

Convertible car seats (which can face rear or forward and accommodate children from infancy through early childhood) are wider and heavier. Many do not fit in airplane seats. If you have a convertible seat at home, check its width before assuming you can use it on a plane. Some convertible seats are designed to be narrower for travel, but these are less common and more expensive.

Booster seats are not allowed on planes. The FAA does not permit booster seats because they rely on the vehicle's seat belt to work properly, and airplane seat belts do not fit the same way. If your child is too large for a car seat but too small for an adult seat belt, you will need to use the airplane seat belt alone.

What you need to bring and what it costs

You will need a ticket for your child if you want to use a car seat. Car seats cannot be used on a lap or in a bassinet, so your child must have their own seat. This means purchasing a full ticket for your child, not just a lap-child ticket. The cost varies by airline and route, but it is typically the same price as an adult ticket or slightly less.

Bring the car seat with you on the plane as a carry-on item. It does not count against your carry-on bag limit on most airlines — the FAA treats car seats as safety equipment. Check your airline's policy to confirm, but this is standard practice. You will install it in the seat you purchased for your child.

If you are checking luggage, you can also check the car seat for free on most airlines, though you risk damage in baggage handling. Many parents bring the seat on board instead to avoid this risk. If you are flying with an infant and no other luggage, bringing the car seat on board is usually the safest option.

What happens if your car seat does not fit

If your car seat is too wide for the airplane seat, you have a few options. You can purchase a different, narrower car seat specifically for travel — some manufacturers make compact versions designed for planes. You can check the seat in baggage and use the airplane seat belt alone for your child. Or you can rent a car seat at your destination if you need one there.

Some parents use a car seat on the outbound flight and check it for the return flight, or vice versa, depending on whether they need it at their destination. If you are renting a car at your destination, you may be able to rent a car seat there as well, which eliminates the need to bring one on the plane.

If you discover at the gate that your seat does not fit, the flight attendant will ask you to check it or remove it from the plane. This is not a safety violation on your part — it is straightforward a matter of the seat being too large for that particular aircraft. Having a backup plan before you arrive at the airport prevents this situation from becoming a problem.

Frequently Asked Questions

Is there an official FAA list of approved car seats I can check?

No. The FAA does not maintain a list of approved car seats because it does not approve them. Any car seat with an NHTSA label that fits in an airplane seat and can be secured with a seat belt meets FAA rules. Your airline may have its own tested list, but this is optional and not required by the FAA.

Can I use a LATCH connector on an airplane?

No. Airplane seats do not have LATCH anchors, so you must use the airplane seat belt instead. Thread the seat belt through the car seat's belt path and tighten it until the seat does not move. This is the only legal installation method on a plane.

Do I have to buy a ticket for my child if I bring a car seat?

Yes. A car seat requires its own seat, so your child must have a ticket. You cannot use a car seat on a lap or in a bassinet. If you do not purchase a seat for your child, you will not be allowed to use the car seat.

What if my car seat is too wide for the airplane seat?

You can check it in baggage, use the airplane seat belt alone for your child, or purchase a narrower travel car seat. Some parents rent a car seat at their destination instead of bringing one on the plane. Contact your airline before your flight to discuss your options.

Can I use a booster seat on a plane?

No. The FAA does not allow booster seats because they depend on the vehicle's seat belt system, which works differently on planes. If your child is too large for a car seat but too small for an adult seat belt, use the airplane seat belt alone.