The Structure of the United States Air Force

The Organizational Structure of the USAF Has a Few Basic Elements

Ground crew signalling to pilot of a military airplane

Frank Rossoto Stcoktrek/Getty Images


The United States Air Force has its own basic structure, terminology, and elements. There are some nuances and differences depending on the type of unit, but some basic elements remain constant throughout this branch of the military.

Airmen and Sections

Individuals may enlist as an airman, or an individual Air Force member. Two or more airmen can form a section. Generally, the section is the place where the person works, also known as a duty section. Some examples of a duty section include the administrative section or the life support section.

However, it's not absolutely necessary to have a section. For instance, many aircrew members and security forces (Air Force "cops") don't have a section. Instead, they belong as a group to a "flight." In Air Force basic training, it's called an element. Each basic training flight is divided into four elements, each with an assigned element leader.


Two or more airmen can form a flight. Two or more sections can also form a flight. It depends on how the squadron is organized, and there are three types of flights:

  • Numbered flights incorporate small mission elements into an organized unit. Basic training has numbered flights, where you could be assigned to Flight 421, for instance.
  • Alpha flights are components of a squadron and consist of elements with identical missions. Flights A, B, and C of a Security Forces Squadron would be an example, or A, B, and C of an F-16 Fighter Squadron.
  • Functional flights consist of elements with specific missions. The Military Personnel Flight (MPF) and the Social Actions Flight are two examples of functional flights.

Squadrons and Groups

Two or more flights form a squadron. The squadron is the lowest level of command with a headquarters element (for example, a squadron commander, or squadron first sergeant). In the Air Force, a squadron commander is generally in the rank of lieutenant colonel (O-5), although smaller squadrons may be commanded by majors, captains and sometimes even lieutenants.

Squadrons are usually identified both numerically and by function. An example would be the 49th Security Forces Squadron or the 501st Maintenance Squadron.

Two or more squadrons form a group. In the Air Force, groups are usually based upon the assignment of squadrons with similar functions. For example, the supply squadron, transportation squadron, and aircraft maintenance squadron would be assigned to the Logistics Group. The flying squadrons would be assigned to the Operations Group. The Dental Squadron and the Medical Squadron would be assigned to the Medical Group, etc.

Usually, groups take on the number of the wing they are assigned to. The 49th Logistics Group, for example, is assigned to the 49th Fighter Wing, at Holloman Air Force Base in New Mexico. The group commander is usually a colonel (O-6).


Two or more groups in the Air Force form a wing. There is only one wing on an Air Force base, and the wing commander is quite often considered to be the "installation commander." There are two types of wings:

  • Composite wings operate more than one kind of aircraft. Individual composite wings can have different missions.
  • Objective wings streamline and consolidate responsibilities and clarify lines of command. They may have operational missions, such as air combat, flying training, or airlift, and they may provide support to a MAJCOM or a geographically separated unit (GSU). Wings may also have a specialized mission (e.g., an "intelligence wing").

Whatever the wing's mission, every wing conforms to the overall concept of "one base, one wing, one boss." Wing commanders most often hold the rank of O-7 (Brigadier General).

Numbered Air Force

A numbered Air Force (e.g., the 7th Air Force) is usually assigned for geographical purposes and primarily used only during wartime. In peacetime, they generally only consist of a limited number of headquarters staff whose job it is to prepare and maintain wartime plans.

Major Command (MAJCOM)

Air Force wings usually report directly to MAJCOMs, which report directly to Air Force Headquarters. Air Force MAJCOMs within the continental United States are primarily organized by mission. For example, wings whose primary mission is to fly combat missions (fighters and bombers) would likely be assigned to the Air Combat Command.

Wings whose primary mission is training would likely be assigned to the Air Force Education and Training Command (AETC). Overseas, MAJCOMs are generally organized by regional area—PACAF (Pacific Air Forces) is one example. Wings located in the Pacific Region (Hawaii, Japan, Korea, etc.) would usually be assigned to PACAF. Another example would be USAFE (the United States Air Forces Europe), which control most wings assigned to Europe.

There is no set size (number of personnel) assigned to any specific element. The size of a command element depends primarily upon the unit type and mission.

For example, an aircraft maintenance squadron would have a different number of airmen assigned than a medical squadron because it has a different mission, different equipment, and therefore different requirements.