What is a Class 1 principal airport?

Principal airports are airports which serve domestic destinations. There are 40 in total. This category is further subdivided into two types: Class 1 principal airports are airports capable of serving jet aircraft with a capacity of at least 100 seats (but could be 70).



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Class I Airport - an airport certificated to serve scheduled operations of large air carrier aircraft that can also serve unscheduled passenger operations of large air carrier aircraft and/or scheduled operations of small air carrier aircraft.

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DCA and LGA are Level 3 airports with primarily domestic or pre-cleared international operations. Allocations are on a continuing basis based on historic slots, a two-month minimum usage requirement, and other provisions in the FAA order and rules.

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Class A: All Airspace above 18,000 ft. Anybody flying here must receive a clearance from, be talking to, and be controlled by ATC. Class B: Airspace within approximately 30 miles and 10,000 feet of the ground around the busiest airports in the US.

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The United States Federal Aviation Administration (FAA) has a system for categorizing public-use airports (along with heliports and other aviation bases) that is primarily based on the level of commercial passenger traffic through each facility.

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Class C airspace areas are designed to improve aviation safety by reducing the risk of mid-air collisions in the terminal area and enhance the management of air traffic operations therein. Aircraft operating in these airspace areas are subject to certain operating rules and equipment requirements.

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Class I NOTAMs ( ICAO ): NOTAMs distributed by means of telecommunication. Class II NOTAMs ( ICAO ) or Published NOTAMs : NOTAMs distributed by means other than telecommunications. In the United States these NOTAMs are published in the Notices To Airmen Publication ( NTAP ) which is issued every 28 days.

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Class D airports have an Air Traffic Control Tower to coordinate airport operations. However, unlike Class B and C airports, they don't require a mandatory approach and departure control (though many do have approach/departure).

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Most Class C airports are home to flight schools and small aircraft hangars as well as scheduled service by airlines. While still busy, Class C airports have less traffic than Class B, so ATC doesn't need as much space to keep them organized. Like Class B, approach control services are provided.

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These days most modern airlines offer travellers a choice of three or four service levels: Economy, Premium Economy, Business, and First Class. This basic structure is usually based on the cost of the flight and the services included during the journey.

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One of the simplest ways an airport gets its code is based on the actual name of the airport. For example, John F. Kennedy International Airport in New York, New York has the code “JFK” while Bradley International Airport in Windsor Locks, Connecticut has the code “BDL.”

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Class C Airspace (Mandatory Radar) A shelf area with an outer radius of 10 nautical miles surrounds the core area. It extends from 1200 feet AGL to 4000 feet AGL. The airspace is depicted on charts as 2 concentric magenta circles. For example, an airport with a surface altitude of 500 feet MSL is depicted above.

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