Final answer:
The hours of operation for most airports are generally limited by operational constraints related to weather conditions and airport infrastructure and capacity.
Step-by-step explanation:
The hours of operation for most airports are generally limited by operational constraints.
One major operational constraint is weather conditions. Weather factors such as clouds, wind, and rain can affect the safety and visibility of aircraft, leading to flight delays or cancellations.
Another operational constraint is airport infrastructure and capacity. Airports have a limited number of runways, gates, and terminal facilities, which can restrict the number of flights that can operate at a given time. This limitation is especially evident during peak travel hours.