Checked baggage

This baggage is limited by airlines with regard to size, weight, and number, usually dependent upon the fare paid, or class of ticket.

Low-cost carriers such as Ryanair in Europe and AirAsia in Asia charge for checked baggage, whilst for full-service airlines the cost is included in the ticket price.

[2][3] According to the rules of most air transportation authorities, such as the U.S. Federal Aviation Administration and European Union's Joint Aviation Authorities, should passengers flying internationally with checked baggage fail to arrive at the departure gate before the flight is closed, that person's baggage must be retrieved from the aircraft hold before the flight is permitted to take off.

In the United States, this does not apply to domestic flights since all bags are required to go through explosive detection machines (EDS) prior to loading.

Making sure passengers board flights onto which they have checked baggage is called "passenger-baggage reconciliation" and is accomplished automatically through two commercially available systems.