Air travel is usually timetabled and planned with precision, but overbooking is still a popular airline strategy and is meant to equalize no-shows and occupancy maximization. The situation can be rather tense and strictly controlled when all the passengers do not miss the boarding and none of them wants to sacrifice his or her seat willingly. When this happens, airlines will have rigid processes that dictate those that will remain on board and those that will wait to board another flight.
Why Overbooking Happens

Airlines are habitually selling more tickets than the number of seats to be filled since past record indicates that not all passengers can show up or cancel at the last moment. This approach enables a carrier to prevent empty seats and profitability but also builds some rare cases when the number of passengers exceeds the number of seats in the aircraft.
Call For Volunteers

In a case of full flight, the airline employees seek volunteers to depart a bit later and receive the compensations or traveling advantages. This is normally done at the gate where the agents can offer incentives until somebody is willing to step aside.
No One Steps Forward

In case no one takes up the offer, the airline has to progress to voluntary to involuntary denial of boarding which is subject to stringent policies. This transition makes the situation a different tune since the choice is no longer made but according to predetermined parameters.
Selection Criteria Used

Airlines use internal policies to determine who is refused to be boarded onto the flight with various considerations being made on factors like: check-in time, fare class, and frequent flyer status. Late arrivals and individuals that booked at a reduced price could be chosen at a greater rate.
Passenger Rights Explained

The involuntarily denied boarding passengers have a right to compensation, which is different based on the delay and destination. The laws in most places stipulate that the airlines pay in form of cash, vouchers, and even other support such as meals or lodging when necessary.
Rebooking Process Begins

On being identified, the passengers affected are usually rebooked into the next flight that is available to their destinations, and in some cases with priority over standby passengers. The aim of airlines is to reduce the disruption, and even the delay can last several hours or even a day.
Details of Payments Count

The compensation varies depending on the prospects like the duration of the delay, or the possibility of the alternative flight to arrive within a given period. In other instances, passengers can be offered a huge percentage of their ticket price or even higher based on the regulations being applied.
Final Boarding Decisions

When the process is completed, the boarding process is repeated with the other passengers and the flight is finally off as scheduled or with slight delay. The experience may be frustrating to the victims, but with well-defined rules and protection, the case might be addressed evenly and uniformly.