Flight numbers are unique identifiers assigned to individual flights by airlines. Each flight number typically consists of a combination of letters and numbers, where the letters represent the airline's code, and the numbers indicate the specific flight. For example, a flight number like AA123 refers to American Airlines flight 123. These numbers help passengers and air traffic control track flights and manage schedules. Flight numbers are used in ticketing, boarding passes, and airport displays, making it easier for travelers to find their flights. They also play a crucial role in ensuring safety and organization within the aviation industry.