How do you fly into a Class B airport?

To enter Class B airspace, all aircraft must meet the following requirements:
  1. ATC clearance required to enter.
  2. Establish and maintain two-way communication prior to entering and while in airspace.
  3. Mode C transponder (within 30 nm, up to 10,000 feet msl)
  4. Student pilot operations restricted.




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The airspace around the busiest US airports is classified as ICAO Class B, and the primary airport (one or more) for which this airspace is designated is called Class B airport. As of January 2023, there are 37 Class B airports in the United States.

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You must receive official clearance. Also, pilots must hold a minimum of a private pilot certification to enter Class B airspace. Sport pilots, recreational pilots, and student pilots are not authorized to operate in Class B airspace.

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Operating Rules and Pilot/Equipment Requirements. Regardless of weather conditions, an ATC clearance is required prior to operating within Class B airspace. Pilots should not request a clearance to operate within Class B airspace unless the requirements of 14 CFR Sections 91.131, 91.215, and 91.225 are met.

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Class B airspace locations must include at least one primary airport around which the Class B airspace area is designated. General Design. There is no standard Class B design. Instead, the size and shape of the Class B airspace area will vary depending upon location-specific ATC operational and safety requirements.

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Many class B airspaces diverge from this model to accommodate traffic patterns or local topological or other features. The upper limit of class B airspace is normally 10,000 feet (3,000 m) MSL. All aircraft entering class B airspace must obtain ATC clearance prior to entry and must be prepared for denial of clearance.

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(c) No person may operate an aircraft in the airspace underlying a Class B airspace area designated for an airport or in a VFR corridor designated through such a Class B airspace area, at an indicated airspeed of more than 200 knots (230 mph).

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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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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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Class B Airspace, indicated by a solid blue line. Class B airspace is shown with a solid blue line around major airports in circles radiating outward.

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To enter Class B airspace, all aircraft must meet the following requirements:
  • ATC clearance required to enter.
  • Establish and maintain two-way communication prior to entering and while in airspace.
  • Mode C transponder (within 30 nm, up to 10,000 feet msl)
  • Student pilot operations restricted.


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An ATC clearance is required for all aircraft that receive separation services within the airspace. Even though you may be operating below the Bravo, you should use caution against operating too closely to the boundaries, especially where the floor of the Class B airspace is 3,000 feet or less above the surface.

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Class B Airspace Class B, or Bravo, airspace surrounds the nation's busiest and largest airports. The main airport that a Class B area has been designated for is considered the primary airport. There can also be other smaller airports within Class B, which are designated as secondary airports.

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I don't have ADS-B Out, where can I fly? Without ADS-B Out, you can fly in any airspace except the ADS-B rule airspace defined by FAR 91.225 (see above). Note that ADS-B is not required in Class D airspace, or under a Class B or Class C airspace shelf, unless it lies within a Mode C veil.

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The Federal Aviation Regulation (FAR) Part 91.119 indicates that, except when necessary for departure or landing, the minimum altitude over urban areas is 1,000 feet above ground level (AGL) and 500 feet AGL over rural areas.

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