Which car seats can be used on airplanes?

• FAA rules allow use of car seats that have a label stating that they are certified for use on aircraft. Infant car seats, convertibles, and forward-facing car seats with harnesses can be used.
• Car seats less than 16 inches wide will fit in most airplane seats.
• NO booster seats or child vests are allowed, even if labeled for aircraft use (see below).
• No "belly belts" made to hold a child on an adult’s lap (allowed in some other countries).
• Car seats with tethers can be used without the tether anchored.
• Aircraft seat belts should be used by children over 40 pounds. (An aircraft lap belt usually will fit a child better than a seat belt in a motor vehicle.)
• Foreign car seats can be used if they are labeled as meeting the standards of a foreign government or the United Nations.