{{photo-req side=right q="Antonov An-225 Mriya on runway Gostomel airport" caption="The Antonov An-225 Mriya on the ground at its home base at Gostomel airport outside Kyiv." alt="Antonov An-225 Mriya six-engine cargo aircraft parked on a runway"}}

The aircraft's working life split cleanly into two very different careers. From 1988 to 1991 it flew as a dedicated component of the Soviet space program, ferrying the Buran orbiter and Energia rocket sections between assembly and launch sites. After the Soviet collapse left it grounded and half-forgotten, Antonov rebuilt it commercially through the 1990s and put it to work hauling record-breaking oversize freight, generators, locomotive parts, wind turbine blades, for Antonov Airlines. In 2020 it flew emergency COVID-19 medical cargo into Europe. In February 2022 it was destroyed on the ground at Hostomel airport outside Kyiv during the opening hours of Russia's invasion of Ukraine, an event that made the loss of a single cargo aircraft into a widely covered symbol of the war's first days.

The Antonov An-225 Mriya specifications read like an outlier even against other giants of military airlift. Six Progress D-18T turbofans, a maximum take-off weight of roughly 640 tonnes, and a cargo hold running 43.35 m long inside an overall airframe length of 84 m.¹ Those numbers, and the story of why they exist, are the subject of the sections below.

From An-124 Airframe to Six-Engine Giant

The Antonov An-225 Mriya began as a 1985 requirement from the Soviet space program, which needed an aircraft capable of moving the Buran orbiter and the core and strap-on stages of the Energia rocket between the manufacturing plants near Moscow and the Baikonur Cosmodrome launch site.¹ Antonov's chief designer at the time, Viktor Tolmachev, took the existing An-124 Ruslan as a starting point rather than designing from a blank sheet. Engineers spliced in new forward and aft fuselage barrel sections to lengthen the airframe, built an enlarged center wing section, and added a second pair of Progress D-18T turbofans, raising the engine count from four to six. Each D-18T produces roughly 229.5 kN (51,600 lbf) of thrust.¹

{{photo-req side=right q="Antonov An-225 Mriya carrying Buran space shuttle Paris Air Show 1989" caption="The An-225 Mriya carrying the Buran orbiter at the 1989 Paris Air Show, its first appearance outside the Soviet Union." alt="Antonov An-225 Mriya aircraft with Buran space shuttle mounted on its back"}}

Carrying the Buran orbiter externally, bolted to three attachment points on the upper fuselage, created a wake-turbulence problem the An-124 never had to solve. Antonov's answer was a twin vertical tail with an enlarged, swept horizontal stabilizer in place of the An-124's single fin, giving the aircraft enough control authority to fly predictably with a shuttle-sized object disrupting airflow over the tail.¹ The nose section kept the An-124's opening cargo door and internal ramp, so the An-225 could still be loaded conventionally through the front when it was not carrying an external payload, and the fuselage held an internal cargo hold measuring 1,300 m³ (46,000 cu ft), at 43.35 m long, 6.4 m wide and 4.4 m tall.¹

The landing gear was rebuilt just as extensively. To spread a fully loaded weight of up to 640 tonnes across pavement not built for it, the An-225 rides on a 32-wheel main gear array, with a subset of wheels steerable so the aircraft can turn inside a runway roughly 60 m wide.¹ Cruise speed sits around 800 km/h, with a service ceiling near 11,000 m, figures the An-124 Ruslan it was derived from cannot match given the smaller aircraft's lighter maximum weight.² Range fell sharply with payload. Fully loaded, the An-225 could cover roughly 4,000 km, while an unladen ferry flight could stretch past 15,000 km on internal fuel alone.¹ A six-person crew, two pilots, two navigators and two flight engineers, operated the aircraft, reflecting its origin as a specialized space-program support type rather than a mass-produced military transport built for a large trained pilot pool.¹

Antonov rolled the completed An-225 out in late 1988, and it flew for the first time on 21 December 1988.³ That initial flight carried no external load. The aircraft's first flight with a Buran orbiter mounted on top followed in May 1989, a milestone Soviet aviation media treated as validation of the whole twin-tail, six-engine redesign.⁴ A few weeks later, in June 1989, the An-225 flew to France carrying a Buran airframe for the Paris Air Show, its first public appearance outside Soviet territory and the moment most of the world first saw the aircraft.¹

{{photo-req side=right q="Antonov An-225 Mriya six engines wing close-up" caption="The six Progress D-18T turbofans that distinguish the An-225 from its four-engine An-124 parent design." alt="Close-up of the six turbofan engines under the wing of the Antonov An-225 Mriya"}}

The Buran program that justified the An-225's existence flew only once, in November 1988, and never carried a crew again before the Soviet Union dissolved and funding evaporated. The An-225 flew a handful of Buran-related ferry missions through 1991 and was then placed in storage at Antonov's Gostomel facility outside Kyiv for roughly eight years, its purpose gone along with the space program it was built to serve.¹ A second, structurally similar airframe had been partially assembled alongside the first at the same plant, intended either as a backup Buran carrier or as the basis for the further-enlarged An-325 concept Antonov studied with British Aerospace in the early 1990s to support the British HOTOL spaceplane project. Neither the second airframe nor the An-325 was ever finished during the Soviet era, and the An-325 concept was dropped entirely once the HOTOL collaboration ended.¹⁸

Antonov returned the surviving An-225 to flying condition between 1998 and 2000, adapting it for a commercial cargo role under Antonov Airlines rather than the abandoned space program.¹ The rebuilt aircraft went on to accumulate more than 200 world and national records for payload and cargo dimensions over the following two decades.⁵ On 11 September 2001, flying a closed 1,000 km circuit with five main battle tanks aboard, it set a single-item payload record of 253.82 tonnes.⁶ In August 2009 it carried a 187,600 kg power-station generator and loading frame from Frankfurt to Yerevan, and in 2010 it flew two 42.1 m wind turbine test blades from China to Denmark, at the time the longest single piece of air cargo ever moved.⁵ Those flights, more than any spec sheet, are why aviation media routinely called the An-225 the world's largest cargo aircraft rather than merely the largest aircraft.

The An-225's most publicized non-military mission came during the early COVID-19 pandemic. On 13 April 2020, chartered by Chapman Freeborn Airchartering, it left Tianjin, China loaded with roughly 100 tonnes of masks, test kits and other medical equipment, refueled in Almaty, Kazakhstan, and landed in Warsaw, Poland on 14 April.⁷ NATO's own press office highlighted the flight as part of allied pandemic relief, and a second Antonov Airlines mission followed on 17 April carrying a further 73 tonnes of supplies to Poland.⁷ Antonov's cargo division described the roughly 1,000 m³ hold volume used on the Tianjin-Warsaw run as the largest single shipment ever carried inside an aircraft's cargo hold, as opposed to strapped externally.⁸ The aircraft's arrival over Warsaw was marked with a low flypast before landing, an unusual gesture that turned a cargo delivery into a small public event in the middle of a lockdown.⁹

Less than two years later the An-225 was destroyed in a war. On 24 February 2022, hours after Russia's invasion of Ukraine began, Russian VDV airborne troops launched a helicopter assault on Antonov (Hostomel) Airport just northwest of Kyiv, aiming to seize the airfield as a staging point for a rapid airlift of reinforcements toward the capital.¹⁰ Ukrainian National Guard troops and territorial defense units resisted the initial landing, and Ukrainian forces claimed at least one Russian Ka-52 attack helicopter shot down during the fighting known as the Battle of Antonov Airport.¹⁰ Russian mechanized forces reinforced the airborne troops the following day and took the airfield, but the delay imposed at Hostomel is widely credited with disrupting Russia's plan for a quick armored dash on Kyiv during the opening phase of the 2022 Russian invasion of Ukraine.¹¹

{{photo-req side=right q="map Hostomel Antonov airport Kyiv Ukraine location" caption="Hostomel (Antonov) Airport sits roughly 25 km northwest of central Kyiv, making it a key objective in the opening hours of the 2022 invasion." alt="Map showing the location of Hostomel Antonov Airport relative to Kyiv, Ukraine"}}

The An-225 itself had returned from its last commercial mission, a COVID test kit run from Tianjin, on 5 February 2022 and was undergoing engine maintenance at Hostomel when the invasion began, immobilized on the ground.¹² Photographs on 27 February showed the aircraft burning inside its hangar, and Ukraine's state defense conglomerate Ukroboronprom confirmed it had been destroyed.¹³ Russian state television aired ground footage on 4 March showing the aircraft's forward fuselage and cockpit section largely gone.¹² Al Jazeera and other outlets covered the wreck as one of the war's most symbolically resonant material losses, given the aircraft's status as a one-of-a-kind Ukrainian-built engineering achievement rather than a mass-produced type that could simply be replaced from a production line.^13,14

{{photo-req side=right q="Antonov An-225 Mriya destroyed wreckage Hostomel airport 2022" caption="Wreckage of the Antonov An-225 Mriya inside its damaged hangar at Hostomel airport after the February 2022 fighting." alt="Burned wreckage of the Antonov An-225 Mriya cargo aircraft at Hostomel airport"}}

In April 2023, Ukrainian prosecutors charged a former Antonov director with negligence, alleging the airworthy aircraft could have been evacuated to a safer airport, such as Leipzig, before the invasion began, but was not.¹² Whether an evacuation was realistically possible in the few hours between the invasion's start and the loss of a usable runway at Hostomel remains disputed, and this account should be treated as one contested version of events rather than settled fact.

Ukrainian forces recaptured full control of Hostomel by early April 2022, once Russian troops withdrew from the wider Kyiv axis, but the airport's runway and terminal infrastructure needed extensive repair before regular cargo operations could resume.¹⁰ The battle fought over the airfield in the war's first two days is now studied separately from the aircraft's destruction a few days later, even though both grew out of the same Russian objective of seizing Hostomel intact.

Exactly one Antonov An-225 Mriya ever flew. The aircraft did not spawn production variants in the way most weapons in the strategic airlifters leaf did, because it was never intended for series production in the first place, it was purpose-built for a single space program's transport needs.

{{photo-req side=right q="Volodymyr Zelenskyy 2022 press conference" caption="Ukrainian president Volodymyr Zelenskyy announced in May 2022 that Ukraine intended to complete the unfinished second An-225 airframe." alt="Ukrainian President Volodymyr Zelenskyy speaking at a 2022 press conference"}}

A second airframe, structurally derived from the same design, was roughly 60 to 70 percent complete when Soviet funding for the Buran program collapsed in the early 1990s, and Antonov mothballed it at the Sviatoshyn plant near Kyiv rather than scrapping it.¹⁵ It survived Russian shelling of the surrounding area during the 2022 invasion. In May 2022 Ukrainian president Volodymyr Zelenskyy announced an intent to finish the second airframe, partly using salvaged components from the destroyed original, as both a practical replacement and a memorial to Ukrainian aviators killed in the war.¹⁵ By late 2022 Antonov had put a rebuild estimate at roughly $500 million, while Ukroboronprom's own internal range ran far higher, from about $120 million to $3 billion, reflecting genuine uncertainty over how much of the unfinished structure and the destroyed aircraft's recovered parts could actually be reused.¹⁶ By September 2024 Antonov had paused further work on the project until the war ends, citing wartime funding priorities.¹⁷

Microsoft released a highly detailed virtual recreation of the Antonov An-225 Mriya for Microsoft Flight Simulator on 27 February 2023, deliberately timed to the exact one-year anniversary of the aircraft's destruction, with all DLC proceeds directed to the rebuild fund.¹⁹

The other closely related design that never left the drawing board was the Antonov An-325, a further-stretched, eight-engine evolution studied jointly with British Aerospace in the early 1990s to carry the proposed British HOTOL spaceplane to release altitude. It never advanced past conceptual studies once the HOTOL program itself was cancelled, and no airframe was ever laid down.¹⁸

Ukraine was the aircraft's only operator throughout its entire service life, first through the Soviet-era Antonov design bureau and then through the independent Ukrainian state enterprise Antonov and its commercial arm, Antonov Airlines, after 1991.¹ The An-225 never carried the flag of any air force. It operated under civil registration for its entire commercial career, chartered by companies moving cargo no other aircraft in the market could physically accept, and its operator profile is really a corporate one, Antonov as owner and operator, rather than a military one.

That single-operator, single-airframe profile is itself unusual for the strategic airlifters category, where most types serve multiple air forces or at least a domestic fleet of several dozen aircraft. The An-225's total worldwide fleet, at its peak, was exactly one flyable example plus one incomplete backup airframe, a fact that shaped both its commercial value (nobody else could underbid Antonov Airlines on a job requiring its specific hold dimensions) and its vulnerability (there was no second aircraft to absorb the loss when the original was destroyed).

The Antonov An-225 Mriya and the Antonov An-124 Ruslan share the same wing structure and cockpit layout, but the production numbers tell the more important story. Antonov built more than 55 An-124s for Soviet military and later Russian and Ukrainian commercial use, while the An-225 stopped at one completed airframe.¹ The An-124 was designed from the outset as a Soviet Air Force heavy transport meant to be built in quantity, and it remains in limited operational service today. The An-225 was a derivative built to solve one narrow problem, moving Buran and Energia hardware, and everything that made it exceptional (the extra pair of engines, the twin tail, the 32-wheel gear) also made it more expensive to operate and impossible to justify building a second of once the Soviet space program that required it disappeared.

Against the American Lockheed C-5 Galaxy, the comparison is one of military procurement philosophy rather than raw capability. The C-5 was built in more than 130 examples for the United States Air Force specifically because Cold War planners wanted redundant strategic airlift capacity spread across a fleet, not concentrated in a single irreplaceable airframe. The An-225 could out-lift any single C-5 on internal cargo volume and could carry external loads the C-5's enclosed hold was never designed for, but the United States Air Force never needed, and never built, anything resembling a one-off super-heavy lifter, because losing a single aircraft to an accident or an attack would not have ended the mission the way it did for Ukraine in 2022.

The is the An-225 still in service question that many searches for this aircraft actually mean to ask is settled. It is not, and cannot be, since the only flying example was destroyed at Hostomel in February 2022.¹³ Whether An-225 vs An-124 is a meaningful comparison at all is arguable given the gap in numbers built, but as a design study in how far a single existing airframe can be stretched before the concept needs an entirely new tail and gear, the pairing remains one of the clearest parent-to-derivative case studies in transport aviation.

Is the Antonov An-225 Mriya still flying? No. The only completed example was destroyed on the ground at Hostomel airport near Kyiv in February 2022, during the opening days of Russia's invasion of Ukraine.¹³

How many An-225s were built? Exactly one was completed and flown. A second, structurally similar airframe was left roughly 60 to 70 percent finished when Soviet-era funding ended, and Ukraine has proposed completing it using salvaged parts from the destroyed original.¹⁵

Why was the An-225 built? Antonov stretched it from the An-124 Ruslan specifically to carry the Soviet Buran space shuttle and Energia rocket sections externally on its back between assembly facilities and the Baikonur launch site.¹

What is the Antonov An-225 Mriya's cargo capacity? Its internal hold measured 1,300 m³, and it repeatedly set world records for external and internal cargo weight, including a 253.82-tonne payload record set in September 2001.⁶

Who manufactured the An-225? Antonov, the Ukrainian aircraft design bureau headquartered in Kyiv, designed and built it, with final assembly carried out at its Gostomel plant.¹

Will the An-225 be rebuilt? Ukraine and Antonov announced plans in 2022 to complete the unfinished second airframe, with cost estimates ranging from roughly $500 million to $3 billion, but Antonov confirmed in 2024 that work had been paused until the war ends.¹⁶