Century car seats are certified for use in aircraft, when used according to manufacturer's instructions. Please refer to your owner's manual for specifics on any seat. If your seat has been approved for aircraft use, there will be a sticker (either on the back, bottom or side of the seat, depending on the size of the label) that says "This restraint has been certified for use in motor vehicles and aircraft" in red lettering. However, even though the seat is FAA approved when used according to the manufacturer's instructions, we recommend calling the airline you are traveling with ahead of time as each airline has its own policies. Booster seats are not certified for aircraft use because aircrafts do not have a shoulder belt.