CLASS B HEAVY TRAFFIC AIRPORTS

Class B is an International Civil Aviation Organization (ICAO) air space designation that protects the approach and departure paths from aircraft not under air traffic control. All aircraft inside Class B airspace are subject to air traffic control. Traffic operating under VFR must be identified on radar and explicitly cleared into the airspace before they can enter. The airspace is commonly depicted as resembling an "upside-down wedding cake." The inner most ring extends from the surface area around the airport to typically 10,000' MSL. Several outer rings usually surround it with progressively higher floors to allow traffic into nearby airports without entering the primary airport's Class B.
United States
The airspace around the busiest US airports is classified as ICAO Class B. The following airports in the United States are Class B:
(listed by state and IATA Airport Code ICAO Airport Code)
Arizona:
PHX/KPHX Phoenix Sky Harbor International
California:
LAX/KLAX Los Angeles International
NKX/KNKX Miramar Marine Corps Air Station
SAN/KSAN San Diego International Lindbergh Field
SFO/KSFO San Francisco International
Colorado:
DEN/KDEN Denver International
Florida:
MIA/KMIA Miami International Georgia:
ATL/KATL Hartsfield-Jackson Atlanta International
Hawaii:
HNL/PHNL Honolulu International
Illinois:
ORD/KORD Chicago O'Hare International
Kentucky:
CVG/KCVG Cincinnati/Northern Kentucky International
Louisiana:
MSY/KMSY Louis Armstrong New Orleans International
Maryland:
ADW/KADW Andrews Air Force Base
BWI/KBWI Baltimore/Washington International
Massachusetts:
BOS/KBOS General Edward Lawrence Logan International (Boston)
Michigan:
DTW/KDTW Detroit Metropolitan Wayne County
Minnesota:
MSP/KMSP Minneapolis-St. Paul International/Wold-Chamberlain
Missouri:
MCI/KMCI Kansas City International
STL/KSTL Lambert-St. Louis International
Nevada:
LAS/KLAS Las Vegas McCarran International
LSV/KLSV Nellis Air Force Base
New Jersey:
EWR/KEWR Newark Liberty International
New York:
JFK/KJFK John F. Kennedy International
LGA/KLGA New York La Guardia
North Carolina:
CLT/KCLT Charlotte/Douglas International
Ohio:
CLE/KCLE Cleveland-Hopkins International
CVG/KCVG Cincinnati/Northern Kentucky International Airport
Pennsylvania:
PHL/KPHL Philadelphia International
PIT/KPIT Pittsburgh International
Tennessee:
MEM/KMEM Memphis International
Texas:
DAL/KDAL Dallas Love Field
DFW/KDFW Dallas-Fort Worth International
HOU/KHOU Houston William P. Hobby
IAH/KIAH George Bush Intercontinental (Houston)
Utah:
SLC/KSLC Salt Lake City International
Virginia:
DCA/KDCA Ronald Reagan Washington National
IAD/KIAD Washington Dulles International
Washington:
SEA/KSEA Seattle-Tacoma International
MCO/KMCO Orlando International
TPA/KTPA Tampa International