At what altitude does Class E airspace typically begin in the United States?

Class E airspace typically begins at 1,200 feet AGL (Above Ground Level) in the United States. This type of airspace is designated to provide sufficient space for a variety of flight operations, and the 1,200 feet AGL threshold is significant because it allows for controlled airspace to accommodate IFR (Instrument Flight Rules) operations in areas where air traffic might require additional separation.

Moreover, Class E airspace can also extend from the surface in certain areas, particularly around airports, to allow for the necessary integrations of visual and instrument traffic. Understanding the characteristics of Class E airspace, including its starting altitude, is crucial for pilots when planning their flights and ensuring compliance with airspace regulations.