AA123 is a flight designation commonly used by airlines to identify a specific route. In this case, it typically refers to a flight operated by American Airlines that connects two cities, often from a major hub to a popular destination. Flight numbers like AA123 help passengers and airline staff track schedules and manage boarding processes. The flight number consists of a two-letter airline code followed by a three-digit number. The IATA (International Air Transport Association) assigns these codes to ensure consistency and ease of communication within the aviation industry. Flight AA123 may vary in its schedule and route depending on the day and season.