Westover Air Reserve Base (IATA: CEF, ICAO: KCEF, FAA LID: CEF) is an Air Force Reserve Command (AFRC) installation located in the Massachusetts communities of Chicopee and Ludlow, near the city of Springfield, Massachusetts. Established at the outset of World War II, today Westover is the largest Air Force Reserve base in the United States, home to approximately 5,500 military and civilian personnel, and covering 2,500 acres (10 km²). Until 2011, it was a backup landing site for the NASA Space Shuttle and in the past few years has expanded to include a growing civilian access airport (Westover Metropolitan Airport) sharing Westover's military-maintained runways. The installation was named for Major General Oscar Westover who was commanding officer of the Army Air Corps in the 1930s.

The host unit is the 439th Airlift Wing (439 AW) of the Fourth Air Force (4 AF), Air Force Reserve Command. Outside of the AFRC command structure, the 439 AW and Westover are operationally gained by the Air Mobility Command (AMC).

Due to its location as one of the few remaining active military air bases in the northeast United States, Westover ARB is transited by many different U.S. military aircraft of all the services.

Westover ARB has the longest runway in Massachusetts.

439th Airlift Wing:

• 439th Operations Group

337th Airlift Squadron

439th Aerospace Medicine Squadron

439th Aeromedical Staging Squadron

439th Operations Support Squadron

439th Airlift Control Flight

• 439th Maintenance Group

439th Maintenance Squadron

439th Aircraft Maintenance Squadron

• 439th Mission Support Group

439th Force Support Squadron

439th Communications Squadron

439th Logistics Readiness Squadron

439th Civil Engineering Squadron

439th Security Forces Squadron

58th Aerial Port Squadron

42nd Aerial Port Squadron

Civil Air Patrol (USAF Auxiliary):

• Westover Composite Squadron, NER-MA-015, Massachusetts Civil Air Patrol

U.S. Army Reserve:

• 302nd Maneuver Enhancement Brigade
• 304th Transportation Company (Cargo)
• 655th Regional Support Group
• 382nd Military Police Battalion (CS)
• 287th Medical Detachment, 804th Medical Brigade
• 226th Transportation Company (Railway Operating)(assigned to the 757th Transportation Battalion (Railway), Milwaukee, WI; battalion and all subordinate units inactivated by September 2015)

U.S. Navy Reserve:

• Naval Mobile Construction Battalion 27

U.S. Marine Corps Reserve:

• Marine Wing Support Squadron 472, Detachment B
• Marine Air Support Squadron 6

Military Entry Processing Command (DOD):

• Springfield Military Entrance Processing Station (MEPS Springfield)

Westover was constructed as "Westover Field," a then-U.S. Army Air Corps (USAAC) installation, in anticipation of World War II, part of a larger War Department plan that envisioned USAAC facilities comprising a "Northeast Air Base" that would become present day Westover Air Reserve Base; a "Southeast Air Base" that would become present day MacDill Air Force Base in Tampa, Florida; a "Southwest Air Base" that would become present day March Air Reserve Base in Riverside, California' and a "Northwest Air Base" that would become present day Fairchild Air Force Base in Spokane, Washington.

Following the establishment of the U.S. Air Force in 1947, Westover Field became Westover Air Force Base.

In 1951, Air Defense Command (ADC) arrived, but then turned over the base to Strategic Air Command (SAC) in 1955 with the relocation of Headquarters, Eighth Air Force (HQ 8AF) to Westover AFB. For host wing responsibilities, SAC initially established the 4050th Air Refueling Wing, later the 499th Air Refueling Wing, to operate from the base. The 99th Bombardment Wing, Heavy (99 BMW) arrived in 1956, equipped with the B-52C Stratofortress and KC-135A Stratotanker and assuming a host wing role. In case of nuclear war, an alternate SAC command bunker for HQ 8AF, called The Notch, was constructed deep within nearby Bare Mountain.

From 1954 to 1962 the Stony Brook Air Force Station in Ludlow was a nuclear weapons Operational Storage Site for Air Materiel Command (AMC-OSS), one of five in the United States. During this period, Stony Brook AFS was the home of the 3084th Aviation Depot Group, part of the 3079th Aviation Depot Wing. In 1962 Stony Brook AFS was transferred to SAC with the 24th Munitions Maintenance Squadron replacing the 3084th, and stored and maintained nuclear weapons for SAC aircraft at Westover AFB until deactivation in 1973. Today, the Stony Brook site is the home of the Massachusetts Municipal Wholesale Electric Company (MMWEC), Hampden County Jail, and other local businesses.

During the Vietnam War, 99th Bombardment Wing aircraft would routinely deploy to Southeast Asia. In 1966, the 99 BMW transitioned to the B-52D while retaining several B-52Cs were retained as proficiency training aircraft until the retirement of all B-52C airframes in 1971. In July 1969, the 57th Air Division at Westover AFB was inactivated and in July 1970, HQ 8AF relocated to Andersen Air Force Base, Guam.

The end of the Vietnam War in 1973, subsequent post-Vietnam reductions in the U.S. defense budget, and a long-standing SAC initiative to retrench from most of its coastal bases to the further inland in order to increase warning time for its alert force in the event of a Soviet attack, all led to the inactivation of the 99 BMW in March 1974 and redistribution of its B-52 and KC-135 aircraft to other SAC units. Rather than close Westover AFB outright, as was being done with several other SAC installations, it was decided that base would be transferred to the Air Force Reserve (AFRES).

Following inactivation of the 99 BMW, the 439th Tactical Airlift Wing (439 TAW), an AFRES unit, relocated to Westover AFB with their C-130 Hercules and C-123 Provider airlift aircraft, assuming host wing duties for the installation. Westover AFB was officially turned over to AFRES on May 19, 1974. In From October 1987, the wing converted to the C-5A model of the C-5 Galaxy and the 439 TAW was redesignated as the 439th Military Airlift Wing (439 MAW), operationally gained by the Military Airlift Command (MAC).

In 1991, Westover AFB was renamed Westover Air Reserve Base. With the inactivation of MAC in 1992, the 439 MAW became operationally gained by the Air Mobility Command (AMC) and was redesignated the 439th Airlift Wing (439 AW), its current designation.

In 1997, AFRES, an Air Force Field Operating Agency, was redesignated as Air Force Reserve Command (AFRC) and became an Air Force major command (MAJCOM) with the 439 AW falling under Headquarters, Fourth Air Force (HQ 4AF) at March ARB, California. However, the 439 AW would still be operationally gained by AMC.

In 2017, the 439 AW retired the last of its C-5A and C-5B Galaxy aircraft and transitioned to the C-5M Super Galaxy.

The 2005 Base Realignment and Closure Commission (BRAC) ruled that Westover ARB would absorb other military units in New England. The expansion proposed the transfer of all military operations at Bradley International Airport to Westover and the nearby Barnes Municipal Airport. The exception to this decision is the 103rd Airlift Wing, which remained at Bradley. A $32 million building project accommodated the additional 1600 service members required by the plan.

The new Armed Forces Reserve Center hosts Army Reserve, Navy Reserve, Marine Corps Reserve, and Air Force Reserve operations. The Massachusetts Army National Guard also made its debut at the base.

The base celebrated its 75th anniversary with an air show on 16–17 May 2015, where the U.S Navy Flight Demonstration Squadron, the Blue Angels. headlined the 2015 Great New England Air Show. During this time, it was announced that the Westover ARB was in the running for a squadron of the new KC-46A Pegasus air refeuling aircraft. Later that year, it was announced that the base would not be receiving the plane, which instead was given to AFRC's 916th Air Refueling Wing (916 ARW) at Seymour Johnson Air Force Base. Westover was also in competition with Tinker Air Force Base and Grissom Air Reserve Base for the KC-46.

In 2017, the 439 AW retired the last of its C-5A and C-5B Galaxy aircraft and transitioned to the newer C-5M Super Galaxy.

The local government credits Westover with spurring development of the Memorial Drive corridor, including several planned hotels and a retail plaza.

The portion of the Westover complex still under military control covers an area of 2,500 acres (10 km²) which contains two runways: 5/23: measuring 11,597 ft × 300 ft (3,535 m × 91 m) and 15/33 measuring 7,085 ft × 150 ft (2,160 m × 46 m). A new Air Traffic Control tower was constructed in 2002 and the old tower was demolished.

In June 1987, a local environmental activist group, the "Valley Citizens for a Safe Environment," brought legal action against the Air Force, claiming that the then-Westover AFB, as a center for military air operations with C-5 aircraft, posed multiple environmental hazards to local residents, to include air pollution, noise pollution, and water contamination hazards. However, given that Westover had already transitioned to an airlift installation, lacking any of the air-dropped or air-launched ordnance storage and/or utilization hazards associated with fighter aircraft or Westover's previous status as a SAC bomber base, all of the factors claimed are also shared with similar-sized commercial airports. Westover ARB's extended operations history has produced numerous hazardous waste sites which the U.S. Department of Defense, in coordination with the Environmental Protection Agency and associated state agencies, continues to takes step to remediate.

According to Federal Aviation Administration records for the 12-month period ending 31 May 2022, the airport had 16,693 aircraft operations, an average of 46 per day: 60% military, 36% general aviation, 4% air taxi and <1% air carrier. There were 37 aircraft at the time based at this airport: 16 military, 10 single engine, 4 multi-engine, 3 jet aircraft, 2 gliders and 2 helicopter.

Military facilities are under control of Colonel Joseph D. Janik, Commander, 439th Airlift Wing. The civilian portion of the airport is run by Michael Bolton, Director of Civil Aviation (an employee of the Westover Metropolitan Corporation).

On August 12, 1953, a United States Navy R6D-1 Liftmater crashed after takeoff. All 4 crewmembers died.

On June 27, 1958, a USAF KC-135A Stratotanker of the 99th Bombardment Wing stalled and crashed, skidded across the Massachusetts Turnpike, disintegrated and burned. The aircraft was attempting a world speed record from New York-London with 3 other USAF KC-135s. All 15 occupants, both crew and passengers, died. This included Brigadier General Douglas Saunders, USAF, commander of SAC's 57th Air Division at Westover AFB, and six civilian journalists,

On August 10, 1959, a 99th Bombardment Wing B-52C (AF Serial Number 54-2682) crashed near New Hampton, New Hampshire when the nose radome failed in flight. Five crew in the forward part of the aircraft successfully ejected and the tail gunner in the rear of the aircraft successfully bailed out.

On June 21, 1963, a USAF Boeing KC-135A Stratotanker of the 99th Bombardment Wing crashed into a wooded hillside nearly 6 miles N of Westover AFB during an instrument approach in heavy rain. One crewmember died.

On January 7, 1971, after taking off from Westover Air Force Base, a 99th Bombardment Wing Boeing B-52C Stratofortress (AF Serial Number 54-2666) crashed into northern Lake Michigan at the mouth of Little Traverse Bay near Charlevoix, Michigan, while on a low-level training flight. All nine crew members aboard were lost. Later retrieval of wreckage indicated a catastrophic in-flight failure of the airframe. No remains of the crewmen were recovered.

• Massachusetts World War II Army Airfields
• Eastern Air Defense Force (Air Defense Command)
• List of military installations in Massachusetts

•  This article incorporates public domain material from the Air Force Historical Research Agency
•  This article incorporates public domain material from Westover Air Reserve Base. United States Air Force.
• Maurer, Maurer. Air Force Combat Units of World War II. Washington, D.C.: U.S. Government Printing Office 1961 (republished 1983, Office of Air Force History, ISBN 0-912799-02-1).
• Ravenstein, Charles A. Air Force Combat Wings Lineage and Honors Histories 1947–1977. Maxwell Air Force Base, Alabama: Office of Air Force History 1984. ISBN 0-912799-12-9.
• Mueller, Robert. Air Force Bases Volume I: Active Air Force Bases Within the United States of America on 17 September 1982. Office of Air Force History, 1989.

• FAA Airport Diagram (PDF), effective October 31, 2024
• Resources for this airport:
  • FAA airport information for CEF
  • AirNav airport information for KCEF
  • ASN accident history for CEF
  • FlightAware airport information and live flight tracker
  • NOAA/NWS weather observations: current, past three days
  • SkyVector aeronautical chart, Terminal Procedures

• Cowboy 57 (1959) James Steward documentary short on B-52 Crew. Documentary features Westover Air Force Base. Cowboy 57 (1959) James Stewart short on B-52 Crew