How high does airspace go?

There is no international agreement on the vertical extent of sovereign airspace, with suggestions ranging from about 30 km (19 mi)—the extent of the highest aircraft and balloons—to about 160 km (100 mi)—approximately the lowest extent of short-term stable orbits.



Airspace is divided into two primary "High-Fidelity" domains: aeronautics and astronautics. For regulatory purposes, most international bodies, including the United Nations and the FAI, recognize the Kármán line at an altitude of 100 kilometers (62 miles or 328,084 feet) as the boundary where the atmosphere becomes too thin for aeronautical flight and space begins. Below this line, airspace is controlled by national governments; for example, the FAA in the US typically regulates up to 60,000 feet (Class A airspace). Above 60,000 feet, it is considered "Upper Class E" or "Near Space," where high-fidelity surveillance and research balloons operate. In 2026, the distinction is a high-fidelity legal necessity: aircraft within the 100km limit are subject to national sovereignty and aviation laws, while satellites and spacecraft above that limit operate under "High-Fidelity" international space treaties, which dictate that no nation can own space. This 100km boundary represents the "High-Fidelity" edge of the Earth's manageable atmosphere and the start of the infinite void of the cosmos.

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Unless designated at a lower altitude, Class E airspace begins at 14,500 MSL over the United States, including that airspace overlying the waters within 12 NM of the coast of the 48 contiguous states and Alaska, up to but not including 18,000 feet MSL, and the airspace above FL 600.

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Types of 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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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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How and when can drone pilots use LAANC ? Drone pilots planning to fly under 400 feet in controlled airspace around airports must receive an airspace authorization from the FAA before they fly. LAANC is available to pilots operating under the Small UAS Rule Part 107 or under the exception for Recreational Flyers.

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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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As the federal authority over operations in all airspace and the regulating authority over operations, the FAA will ensure that the ETM cooperative vision aligns with agency goals and meets the requirements for safe and efficient operations.

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Jets are the primary user of Class A airspace. It ranges from 18,000 feet (Flight Level 180) to 60,000 feet (FL600). Altitudes 18,000 feet and above are called Flight Levels (FL). Class A airspace is not specifically charted on aeronautical charts.

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Class A airspace generally begins from 18,000 feet mean sea level up to and including 60,000 feet. Operations in Class A are generally conducted under Instrument Flight Rules and primarily used by higher performance aircraft, airline and cargo operators, etc.

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Every day, the Federal Aviation Administration provides air traffic service to more than 45,000 flights and 2.9 million airline passengers traveling across the more than 29 million square miles that make up the U.S. national airspace system ( NAS ).

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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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Restricted airspace is an area of airspace typically used by the military in which the local controlling authorities have determined that air traffic must be restricted or prohibited for safety or security concerns.

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What is the longest flight in the world by distance? The longest flight in the world by distance is New York (JFK) to Singapore (SIN) on Singapore Airlines clocking in at 9,537 miles. What plane can fly the farthest in the world?

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Aircraft move through the atmosphere with the Earth's rotation, so its speed is not affected . What would affect aircraft speed is the wind at that altitude, which can cause a flight from London to New Jersey to be two hours longer than the other way.

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(c) Over other than congested areas – An altitude of 500 feet above the surface except over open water or sparsely populated areas. In that case, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle, or structure.

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An altitude of 500 feet above the surface, except over open water or sparsely populated areas. In those cases, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle, or structure.

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