At what altitude do airways typically extend up to?

Airways, particularly in controlled airspace within many countries, are typically defined as extending from a specified minimum altitude up to 24,000 feet. This altitude is significant because it marks the transition into higher altitudes, where different regulations and procedures for air traffic management apply. The structure of airways is designed to facilitate the safe and efficient movement of aircraft by providing a stable route for navigation and separation from other traffic.

While airways can be found at lower altitudes, the maximum limit is typically anchored at 24,000 feet, as it ensures aircraft compliance with certain air traffic control measures and navigational aids that are standard within the region. Above this altitude, different air traffic control procedures, including transition to en route altitude strata, come into play, which affect how air traffic is managed.

Hence, the correct answer is that airways typically extend up to 24,500 feet, aligning with established standards for air traffic control operations.