How High Does Class E Airspace Go? A Detailed Look

For pilots and aviation enthusiasts, knowing the boundaries of the various classes of airspace is critical for safe and legal flight operations. One commonly asked question is: how high does Class E airspace go?

With the proliferation of drones and other new technologies taking to the skies, understanding where unrestricted airspace begins is more important than ever.

If you’re short on time, here’s a quick answer: Class E airspace typically extends from 1,200 feet above ground level (AGL) up to 18,000 feet mean sea level (MSL) where it meets Class A airspace. However, the floors and ceilings of Class E can vary depending on the location.

In this comprehensive guide, we’ll take an in-depth look at Class E airspace, how high it extends, exceptions to the general rules, how it interacts with other classes of airspace, and key things pilots need to know when operating in Class E airspace.

What is Class E Airspace?

Class E airspace is a category of airspace designated by the Federal Aviation Administration (FAA) in the United States. It is primarily used for controlled airspace that extends beyond the boundaries of other airspace classes, such as Class B, C, and D. Class E airspace can be found at various altitudes, depending on the location and specific requirements of the airspace.

General nature and characteristics

Class E airspace is generally considered to be controlled airspace, meaning that air traffic control services are provided to aircraft operating within it. However, there are some areas where Class E airspace is uncontrolled, particularly at lower altitudes or in remote areas with less air traffic.

One of the key characteristics of Class E airspace is that it typically starts at an altitude of either 700 feet above ground level (AGL) or 1,200 feet AGL, depending on the specific requirements of the airspace.

Above these altitudes, Class E airspace extends all the way up to either 18,000 feet or the base of the overlying Class A airspace.

Types of operations conducted in Class E

Various types of operations are conducted within Class E airspace, including general aviation flights, commercial flights, military operations, and instrument flight rules (IFR) operations. General aviation flights, which include private and recreational flying, make up a significant portion of the traffic in Class E airspace.

Commercial flights, both scheduled and unscheduled, may also operate within Class E airspace, particularly when transitioning from one controlled airspace area to another. Military operations, such as training exercises or aircraft movements, may also take place in designated Class E airspace.

Regulations and requirements

When operating in Class E airspace, pilots are required to comply with specific regulations and requirements set by the FAA. These regulations include minimum altitude requirements, communication and transponder requirements, and adherence to instrument flight rules (IFR) procedures if applicable.

Pilots must also be aware of any special use airspace or temporary flight restrictions that may be in effect within Class E airspace. These restrictions can include airspace closures, temporary flight restrictions due to VIP movements, or other airspace limitations.

For more detailed information on Class E airspace, you can visit the FAA’s official website or consult the Aeronautical Information Manual (AIM) for specific regulations and procedures.

Typical Limits of Class E Airspace

Lower limit

The lower limit of Class E airspace varies depending on the specific location and surrounding airspace. In general, Class E airspace starts at either the surface of the earth or at a designated altitude, such as 700 feet above ground level (AGL).

The lower limit is typically determined by the need to separate aircraft from other types of airspace, such as Class G airspace, which has no defined vertical limit.

Upper limit

The upper limit of Class E airspace can extend to different altitudes depending on the purpose and location of the airspace. In most cases, Class E airspace extends up to 18,000 feet mean sea level (MSL) unless otherwise specified.

However, there are variations and exceptions to this rule, especially in areas with high-density traffic or specific airspace requirements.

Variations and exceptions

Class E airspace can have variations and exceptions based on specific needs and regulations. For example, in some areas, Class E airspace may extend all the way up to 14,500 feet MSL instead of the usual 18,000 feet MSL.

This is commonly known as “Class E transition airspace” and is often found in areas where Class E airspace is used to separate instrument flight rules (IFR) traffic from visual flight rules (VFR) traffic.

Additionally, there are certain airspace areas where Class E airspace extends further above the typical 18,000 feet MSL limit. For example, Class E airspace can extend up to 60,000 feet MSL in some parts of the United States, particularly near major airports or areas with high-altitude traffic.

It’s important for pilots to familiarize themselves with the specific limits and variations of Class E airspace in the areas they operate in. The Federal Aviation Administration (FAA) provides detailed charts and publications that outline the specific airspace boundaries and limits, such as the Aeronautical Chart User’s Guide (https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/aero_guide/).

By understanding and adhering to the limits of Class E airspace, pilots can ensure safe and efficient operations within the airspace system.

Interactions with Other Airspace Classes

When it comes to navigating the skies, understanding the interactions between different airspace classes is crucial for pilots. In this article, we will explore how Class E airspace, which is known for its extensive coverage, intersects with other airspace classes.

Where Class E meets Class A

Class A airspace, which extends from 18,000 feet above mean sea level (MSL) to flight level 600, is the highest and most controlled airspace class. Class E airspace, on the other hand, starts at 14,500 feet MSL, or in some cases, at the surface.

This means that there is a vertical overlap between Class E and Class A airspace.

When flying in Class E airspace below 18,000 feet, pilots need to be aware of the potential for encountering aircraft operating under instrument flight rules (IFR) in Class A airspace. It is important to maintain communication with air traffic control (ATC) and be vigilant for any potential conflicts.

Where Class E meets Class B, C, or D

Class B, C, and D airspace are all controlled airspace classes that require clearance from ATC to enter. Class E airspace can intersect with these classes either vertically or horizontally, depending on the specific airspace configuration.

When Class E airspace intersects with Class B, C, or D airspace vertically, pilots are required to obtain clearance from ATC to enter the controlled airspace. This helps ensure the safety and efficient flow of air traffic in the area.

It is essential for pilots to familiarize themselves with any airspace restrictions and communicate with ATC accordingly.

Uncontrolled vs. controlled Class E airspace

Class E airspace can be further categorized into controlled and uncontrolled airspace. Controlled Class E airspace is typically found around airports and requires clearance from ATC for entry. On the other hand, uncontrolled Class E airspace does not require ATC clearance but still has rules and regulations pilots must adhere to.

It is important for pilots to be aware of the boundaries between controlled and uncontrolled Class E airspace. This knowledge helps them determine when they need to establish communication with ATC and when they can operate independently.

Additionally, being familiar with the specific regulations and procedures in each type of airspace ensures safe and efficient operations.

Requirements for Operating in Class E Airspace

VFR weather minimums

When operating in Class E airspace, pilots must adhere to specific weather minimums to ensure safe flight operations. For Visual Flight Rules (VFR) operations, the minimum requirements typically include a visibility of at least three statute miles and a cloud clearance of 500 feet below, 1,000 feet above, and 2,000 feet horizontally from clouds.

Equipment requirements

Pilots flying in Class E airspace are required to have certain equipment on board their aircraft. This includes a functioning radio and transponder, which allows for communication and identification purposes.

Additionally, aircraft operating in controlled airspace often need to be equipped with an altitude encoding transponder (Mode C) to provide accurate altitude information to air traffic control.

Communications and clearance requirements

Proper communication is crucial when operating in Class E airspace. Pilots must establish two-way radio communication with air traffic control (ATC) before entering controlled airspace. This can be done by contacting the appropriate ATC facility, such as a nearby air traffic control tower or a designated frequency.

In some cases, pilots may also need to obtain an ATC clearance or authorization, depending on the specific airspace and flight requirements.

Additional rules

In addition to the above requirements, there are other rules pilots must follow when operating in Class E airspace. For example, pilots must comply with any special procedures or restrictions that may be in place, such as temporary flight restrictions (TFRs) or airspace reservations.

It is also important to stay updated on NOTAMs (Notice to Airmen) for any changes or updates to the airspace conditions.

For more detailed information on operating in Class E airspace, pilots can refer to the Federal Aviation Administration’s (FAA) website or consult the Aeronautical Information Manual (AIM) for specific guidelines and regulations.


We’ve covered a lot of ground on the seemingly simple question of how high Class E airspace extends. The one-word answer is 18,000 feet MSL, but the full picture requires understanding the intricacies based on location, weather conditions, and interactions with other airspace classes.

Pilots must ensure they follow all applicable rules and regulations when operating in Class E airspace.

Understanding the complexities and requirements of the National Airspace System is critical for maintaining safety and compliance. With the right knowledge, training, and thorough pre-flight preparations, pilots can confidently navigate through Class E airspace and on to their destinations.

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