How low is controlled airspace?

Depending on location, controlled airspace may start as low as the ground or as high as 14,500 feet in the United States. With each airspace having varying requirements for pilots and weather, it's important to be aware of classes you might potentially encounter on and flight.



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Generally, that airspace from the surface to 10,000 feet MSL surrounding the nation's busiest airports in terms of IFR operations or passenger enplanements.

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Definition. Generally, that airspace from the surface to 4,000 feet above the airport elevation (charted in MSL) surrounding those airports that have an operational control tower, are serviced by a radar approach control, and that have a certain number of IFR operations or passenger enplanements.

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Class A airspace is generally the airspace from 18,000 feet (~3.4 miles, 5.5 km) mean sea level (MSL) up to and including flight level (FL) 600 (~11.4 miles, 18.3 km), including the airspace overlying the waters within 12 nautical miles (NM) (~13.8 miles, 22.2 km) of the coast of the 48 contiguous states and Alaska.

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In general, you can only fly your drone in uncontrolled airspace below 400 feet above the ground ( AGL ). Commercial drone operators are required to get permission from the FAA before flying in controlled airspace.

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There is no existing mechanism for the FAA to monitor if there are drone pilots, licensed or otherwise, who will fly above this altitude limit. That is well and fine until you get into a close encounter with a manned aircraft, for which you could be facing heavy penalties if the FAA can identify you as the drone pilot.

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The minimum safe altitude of a route is 19,000 feet MSL and the altimeter setting is reported between 29.92 and 29.43 “Hg, the lowest usable flight level will be 195, which is the flight level equivalent of 19,500 feet MSL (minimum altitude (TBL ENR 1.7-1) plus 500 feet).

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Upper Class E airspace operations refer to those that take place over 60,000 feet above mean sea level (MSL) in the National Airspace System (NAS). Operations in upper Class E airspace have historically been limited due to the challenges faced by conventional fixed wing aircraft in reduced atmospheric density.

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For temporary restricted areas and temporary MOAs, pilots should review the Domestic Notices found on the Federal NOTAM System (FNS) NOTAM Search website under External Links or the Air Traffic Plans and Publications website, the FAA SUA website, and/or contact the appropriate overlying ATC facility to determine the ...

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Download the FAA's safety app, which provides real-time information about airspace restrictions and other flying requirements based on your GPS location.

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§ 91.117 Aircraft speed. (a) Unless otherwise authorized by the Administrator, no person may operate an aircraft below 10,000 feet MSL at an indicated airspeed of more than 250 knots (288 m.p.h.).

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(Instructor added note: FL 600 or Flight Level 600, means a flying altitude of 60,000 ft. MSL, for more details, check out this website .) Class B. Generally, airspace from the surface to 10,000 feet MSL surrounding the nation's busiest airports in terms of airport operations or passenger enplanements.

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Remote ID also helps the FAA, law enforcement, and other federal agencies locate the control station when a drone appears to be flying in an unsafe manner or where it is not allowed to fly.

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In short, the real purpose of Class F is to allow flights to remain IFR in uncontrolled environments. Since this is a sort of mix between Class E and Class G airspace, there is no Class F inside the United States.

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Drone pilots operating under Part 107 may fly at night, over people and moving vehicles without a waiver as long as they meet the requirements defined in the rule. Airspace authorizations are still required for night operations in controlled airspace under 400 feet.

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