The largest military aircraft in the world are engineering marvels designed to transport enormous cargo loads, move military personnel across continents, refuel other aircraft, largest military aircraft and support demanding operations. From the giant Antonov An-124 Ruslan to the American C-5M Super Galaxy and the iconic C-17 Globemaster III, these aircraft play a vital role in modern military logistics.

However, the title of the largest military aircraft can mean different things. An aircraft may be the largest by wingspan, maximum takeoff weight, length, or payload capacity. Some are purpose-built military transports, while others are civilian-designed aircraft adapted for military service or strategic cargo missions.

In this AirlinesNews guide, we explore some of the world’s biggest military and military-capable aircraft, their specifications, and the roles they perform.

What Is the Largest Military Aircraft in the World?

There is no single answer unless the measurement is specified. The Antonov An-124 Ruslan is one of the largest operational military-capable cargo aircraft, while the U.S. Air Force’s C-5M Super Galaxy is among the largest transport aircraft operated specifically by a major military service.

The Antonov An-225 Mriya was larger than both, but it was a unique heavy-lift aircraft primarily used for oversized commercial cargo. It was destroyed during Russia’s invasion of Ukraine in 2022 and is no longer operational.

For most discussions of military transport aircraft, the An-124, C-5M, and C-17 are leading examples because of their size, payload capacity, and strategic importance.

Top 7 Largest Military Aircraft

1. Antonov An-124 Ruslan

<text>Type: Heavy strategic transport aircraft</text>

<text>Length: Approximately 69 meters (226 feet)</text>

<text>Wingspan: Approximately 73 meters (240 feet)</text>

<text>Maximum payload: Up to approximately 150 tonnes, depending on operating conditions</text>

The Antonov An-124 Ruslan is one of the largest cargo aircraft in the world and a major platform for transporting oversized equipment. Developed in the Soviet Union, it was designed to carry heavy military vehicles, industrial machinery, helicopters, and other large loads.

Its spacious cargo compartment, heavy-duty landing gear, and loading systems allow it to transport items that cannot fit inside many conventional cargo planes. The aircraft has been used for military logistics and specialized heavy-lift missions by various operators.

Although the An-124 was developed with military transport requirements in mind, some aircraft have also been used for commercial cargo operations. Its combination of payload capacity and cargo-space dimensions makes it an important part of the global heavy-airlift fleet.

2. Lockheed C-5M Super Galaxy

<text>Type: U.S. strategic military transport aircraft</text>

<text>Length: Approximately 75 meters (247 feet)</text>

<text>Wingspan: Approximately 68 meters (222 feet)</text>

<text>Maximum payload: Approximately 127 tonnes (281,000 pounds)</text>

The C-5M Super Galaxy is one of the largest aircraft operated by the United States Air Force. It was developed to transport heavy and oversized military equipment over long distances, including vehicles, helicopters, and large quantities of supplies.

The aircraft features a nose that opens upward and a rear cargo door, allowing loading and unloading from both ends. This arrangement helps crews handle bulky cargo efficiently.

The C-5M is an upgraded version of the original C-5, featuring modernized engines and avionics. These improvements enhance reliability and performance while allowing the Air Force to continue using the aircraft for strategic airlift missions.

3. Antonov An-225 Mriya

<text>Type: Ultra-heavy transport aircraft</text>

<text>Length: Approximately 84 meters (275 feet)</text>

<text>Wingspan: Approximately 88.4 meters (290 feet)</text>

<text>Maximum payload: Up to approximately 250 tonnes</text>

The Antonov An-225 Mriya was the largest aircraft ever completed by overall length and maximum takeoff weight among widely recognized operational aircraft. It was originally developed to transport the Soviet Buran space shuttle and other exceptionally large cargo.

The aircraft’s six engines, enormous wingspan, and heavy-duty landing gear enabled it to carry loads beyond the capacity of most other cargo aircraft. It later became famous for transporting generators, industrial equipment, and other oversized items worldwide.

The An-225 was destroyed at Hostomel Airport in Ukraine in February 2022. Although discussions about possible reconstruction have occurred, the original aircraft is no longer flying. Its legacy remains significant in the history of heavy-lift aviation.

4. Boeing C-17 Globemaster III

<text>Type: Strategic and tactical military transport aircraft</text>

<text>Length: Approximately 53 meters (174 feet)</text>

<text>Wingspan: Approximately 52 meters (170 feet)</text>

<text>Maximum payload: Approximately 77.5 tonnes (170,900 pounds)</text>

The C-17 Globemaster III is one of the most versatile military transport aircraft in service. It combines long-range cargo capacity with the ability to operate from many relatively short or austere airfields.

The aircraft can carry tanks, armored vehicles, helicopters, troops, and humanitarian supplies. Its rear loading ramp and advanced flight controls support operations where infrastructure is limited.

Compared with the larger An-124 and C-5M, the C-17 offers a useful balance between payload, range, and access to smaller airfields. It is operated by the United States and several international partners.

5. Airbus A400M Atlas

<text>Type: Military transport aircraft</text>

<text>Length: Approximately 45 meters (148 feet)</text>

<text>Wingspan: Approximately 42 meters (138 feet)</text>

<text>Maximum payload: Approximately 37 tonnes</text>

The Airbus A400M Atlas is a European military transport aircraft designed to bridge the gap between tactical airlifters and larger strategic transports.

Its turboprop engines support operations from a variety of runways, including some shorter or less-prepared airstrips. The A400M can carry military vehicles, troops, medical equipment, and humanitarian cargo.

Although it is smaller than the C-5M and An-124, its combination of cargo capacity and tactical flexibility makes it an important aircraft for modern military logistics.

6. Ilyushin Il-76

<text>Type: Military transport aircraft</text>

<text>Length: Approximately 47 meters (154 feet)</text>

<text>Wingspan: Approximately 50.5 meters (166 feet)</text>

<text>Payload: Varies by variant; many versions are designed to carry around 40–60 tonnes</text>

The Ilyushin Il-76 is a Soviet-designed transport aircraft widely used by military and civilian operators. It has served for decades in missions involving cargo delivery, troop transport, humanitarian assistance, and emergency logistics.

Its high-mounted wings, four jet engines, and rear cargo ramp give it a distinctive appearance. Different versions have been adapted for aerial refueling, airborne early warning, and other specialized roles.

The Il-76 remains significant because it can transport substantial loads while operating across a broad range of conditions.

7. Boeing KC-46 Pegasus

<text>Type: Aerial refueling and transport aircraft</text>

<text>Length: Approximately 51.5 meters (169 feet)</text>

<text>Wingspan: Approximately 48 meters (157 feet)</text>

The KC-46 Pegasus is based on the Boeing 767 commercial aircraft and is designed primarily to refuel military aircraft in flight. It can also transport passengers, cargo, and medical patients.

Although it is not a heavy airlifter in the same category as the An-124 or C-5M, its large airframe and strategic support role make it an important military aircraft.

Aerial refueling extends the range and endurance of compatible fighters, bombers, and other aircraft, helping air forces carry out long-distance missions.

How Are the Largest Military Aircraft Compared?

Aircraft size is measured in several ways, and the results can differ depending on the category.

• Length: The distance from the nose to the tail.
• Wingspan: The distance between the wingtips.
• Maximum takeoff weight: The maximum permitted weight of the aircraft, including fuel, crew, and cargo.
• Payload capacity: The weight of passengers, cargo, or equipment an aircraft can carry.
• Cargo volume: The available internal space for transporting large or bulky objects.

For example, the An-225 was exceptional in overall size and payload capacity, but it is no longer operational. The An-124 and C-5M remain important examples of very large strategic transport aircraft, while the C-17 is valued for combining substantial payload capacity with flexible runway access.

Why Do Militaries Need Such Large Aircraft?

Strategic Airlift

Large transport aircraft can move vehicles, helicopters, engineering equipment, and supplies across long distances. This capability is essential when military forces must deploy quickly or sustain operations far from their home bases.

Humanitarian Relief

Heavy military transports are also useful during natural disasters and humanitarian emergencies. They can deliver food, medical supplies, temporary shelters, generators, and emergency vehicles to areas where roads or ports have been damaged.

Moving Oversized Equipment

Some equipment cannot be transported efficiently by ordinary cargo aircraft. Large military transports provide the cargo space and loading capacity required for bulky machinery and specialized vehicles.

Supporting Global Operations

Airlift aircraft help military organizations move personnel and equipment between bases and operational locations. When combined with aerial refueling and other support systems, they contribute to a broader logistics network.

Frequently Asked Questions

1. What is the largest military aircraft in the world?

The answer depends on the definition. The Antonov An-124 is one of the largest operational military-capable cargo aircraft. The C-5M Super Galaxy is among the largest transport aircraft operated by the U.S. Air Force. The An-225 was larger but was destroyed in 2022.

2. Is the Antonov An-225 still flying?

No. The only completed An-225 was destroyed at Hostomel Airport in Ukraine in February 2022. Although reconstruction has been discussed, the original aircraft is no longer operational.

3. Which military aircraft can carry the most cargo?

The An-225 had a payload capacity of approximately 250 tonnes. Among major military-capable transports, the An-124 can carry up to around 150 tonnes, while the C-5M can carry approximately 127 tonnes under specified conditions.

4. Is the C-17 Globemaster III the largest military transport plane?

No. The C-17 is smaller than the C-5M and An-124 in several size and payload measurements. However, it is highly versatile because it can carry heavy loads while operating from many airfields that are unsuitable for larger aircraft.

5. What is the difference between a military transport plane and a tanker?

A transport aircraft primarily moves people and cargo. An aerial tanker transfers fuel to compatible aircraft during flight. Some platforms, such as the KC-46 Pegasus, combine aerial refueling with transport capabilities.

6. What is the biggest military aircraft still in regular service?

This depends on the operator and how military service is defined. The Antonov An-124 and U.S. C-5M Super Galaxy are among the largest heavy transport aircraft in military or military-capable use.

7. Why are military cargo aircraft so expensive?

Large transport aircraft require powerful engines, reinforced structures, sophisticated flight systems, extensive maintenance, and specialized loading equipment. Operating expenses also include fuel, crew training, spare parts, and infrastructure.

Conclusion

The largest military aircraft in the world demonstrate how engineering makes it possible to transport enormous loads across continents. The Antonov An-124, C-5M Super Galaxy, and C-17 Globemaster III remain important examples of heavy and strategic airlift, while the Airbus A400M and Ilyushin Il-76 serve different transport requirements. largest military aircraft The Antonov An-225 remains an aviation landmark despite its destruction in 2022. Its history highlights the extraordinary scale that heavy-lift aircraft can achieve.