On almost all major airlines in 2026, a child car seat does not count as checked baggage and can be checked for free. This policy applies whether you check the seat at the ticket counter or "gate-check" it at the aircraft door. Most airlines also allow you to check one stroller per child free of charge in addition to the car seat. If you have purchased a separate seat for your child, you can often bring a FAA-approved car seat on board to use during the flight. It is highly recommended to use a protective travel bag when checking a car seat to prevent the straps from getting caught in conveyor belts or the fabric from getting dirty. This "free of charge" rule is an industry standard designed to encourage child safety, ensuring that parents aren't financially penalized for bringing the necessary equipment to keep their children secure during their travels and at their final destination.