Flight codes are unique identifiers assigned to flights, typically consisting of a combination of letters and numbers. The first part of the code usually represents the airline, such as American Airlines using "AA" for its flights. The following numbers indicate the specific flight, helping passengers and air traffic control easily track and manage flights. These codes are essential for various purposes, including booking tickets, checking flight status, and coordinating airport operations. For example, a flight code like "AA123" refers to a specific American Airlines flight, making it easier for travelers to find information about their journey.