Final answer:
The number of diaper changing tables on an airplane varies depending on the airline and aircraft type. Most commercial airlines have at least one changing table in the lavatories, but smaller planes may not have them. Parents should check with the airline before the flight.
Step-by-step explanation:
The number of diaper changing tables on an airplane depends on the airline and the type of aircraft. Most commercial airlines have at least one diaper changing table in the aircraft's lavatories. Some larger aircrafts may have multiple changing tables spread throughout the lavatories. However, it's important to note that not all aircrafts are equipped with diaper changing tables, especially smaller regional jets.
The purpose of these tables is to provide a safe and sanitary space for parents to change their baby's diapers during a flight. They are usually foldable and attached to the wall in the lavatories. Parents should always check with the airline beforehand to confirm if diaper changing tables are available on their specific flight.