A US Air Force C-17 Globemaster III landed in Moscow from Latvia, sparking speculation over its purpose as neither Washington nor the Kremlin has provided an explanation.
A US Air Force C-17 Globemaster III transport aircraft landed at Moscow’s Vnukovo Airport on Tuesday after flying from Riga, Latvia, according to publicly available flight-tracking data.
The unexplained arrival has sparked speculation about a possible diplomatic mission, although neither Washington nor Moscow has provided an official explanation.
Mystery flight from Riga to Moscow
The aircraft, operating under the callsign RCH4555, departed Riga at around 8:50 am Moscow time and landed at Vnukovo shortly after 10 am, Flightradar24 data showed.
Reuters reported that the Boeing Globemaster was carrying a US-registered tail number. Video footage of its arrival showed a cameraman joking, “we are under attack!” as the military aircraft approached the airport.
The C-17 had arrived in Riga on August 23 after flying from Joint Base Andrews near Washington, DC, according to flight-tracking data.
The aircraft departed Andrews shortly before 5 pm ET on Sunday. The Maryland base is the primary facility used by the US president and senior officials for official air travel.
Kremlin says it has no information
The Kremlin said it was unaware of the aircraft’s arrival.
Kremlin spokesman Dmitry Peskov told reporters that there were no meetings planned with representatives of the US administration in Moscow this week. US European Command also reportedly declined to provide information about the flight.
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No details have emerged about the aircraft’s passengers, cargo or mission.
The last known direct flight by a US-registered aircraft from Europe to Russia came in January, when US special envoys Steven Witkoff and Jared Kushner travelled to Moscow for talks with Russian President Vladimir Putin over the Ukraine war.
Diplomatic mission or prisoner exchange?
The lack of an official explanation has fuelled speculation that the flight could be connected to diplomatic contacts between Washington and Moscow.
One possibility raised by reports is a potential prisoner exchange. The speculation comes after the release of former US Marine Robert Gilman earlier this month and previous prisoner exchanges between the two countries.
Another theory is that the aircraft could be linked to a discreet diplomatic channel as efforts to revive Ukraine peace talks remain stalled.
However, there is no evidence so far confirming that the flight was connected to negotiations, a prisoner exchange or any other diplomatic activity.
Some military aviation observers have also speculated about a possible connection to US Secretary of War Pete Hegseth.
However, Pentagon records reportedly showed Hegseth was in Nebraska and Wisconsin on Monday as part of his “Arsenal of Freedom” tour, making any direct connection to the Moscow-bound aircraft unclear.
Why the C-17 matters
The C-17 Globemaster III is a heavy strategic transport aircraft operated by the US Air Force and designed to move troops, military vehicles and large quantities of cargo over long distances.
The aircraft can carry a maximum payload of about 170,900 pounds (77,500 kg) and is capable of both strategic and tactical airlift missions. It can also conduct airdrops and aeromedical evacuation operations.
With a length of roughly 53 metres and a wingspan of nearly 52 metres, the aircraft is powered by four Pratt & Whitney F117 turbofan engines and has a cruising speed of around 450 knots.
Its ability to transport heavy equipment and personnel makes it suitable for a wide range of military and government missions. That versatility, combined with the absence of an official explanation, has made its unexpected appearance in Moscow particularly notable.