A Turkish Airlines flight from Istanbul to Moscow was forced to turn back on Sunday, 20 September after approaching the Russian capital during a large-scale Ukrainian drone attack, according to flight-tracking data and Turkish media reports. The incident underscores the growing aviation disruption caused by the intensifying air war over Russian territory.

What Happened to Flight TK407

Turkish Airlines flight TK407, operated by an Airbus A330-300, departed Istanbul at 2:22 am local time on Sunday (2322 GMT Saturday) bound for Moscow's Vnukovo International Airport. After entering Russian airspace and nearing Moscow, the aircraft reversed course and eventually landed back in Istanbul. The airline has not issued a detailed public statement on the diversion.

The disruption extended well beyond a single flight. At least 35 Turkish-operated flights to and from Vnukovo were delayed or cancelled on Sunday, according to reports. Vnukovo serves as one of Moscow's primary commercial aviation hubs, and closures there cascade rapidly across connecting routes.

Scale of the Drone Attack

Moscow Mayor Sergei Sobyanin confirmed that Russian air defences had intercepted more than 1,600 drones across the country since Saturday, with approximately 450 of those targeting approaches to Moscow. The scale of the assault represents one of the largest single overnight drone campaigns of the conflict so far.

Russian air defence systems reportedly shot down 44 guided aerial bombs, eight HIMARS rockets, two Neptune long-range guided missiles, and 5,706 Ukrainian drones over the course of the week, according to the Russian Defence Ministry.

Russia's Counter-Strikes and Claimed Targets

The Russian Defence Ministry said on Friday that Russian forces had conducted two massive and five group strikes against Ukrainian targets over the preceding week, seizing ten settlements. Claimed targets included defence, metallurgical, motor and electronic enterprises, military logistics and distribution centres, fuel-power, railway and road infrastructure, drone manufacturing workshops, ammunition and fuel depots, and ports, as well as what Moscow described as temporary deployment areas for Ukrainian armed forces and foreign mercenaries.

On the maritime front, the ministry claimed hits on 12 Ukrainian dry cargo ships, two sea ferries, one tanker, and one tugboat.

Lavrov's Warning on Western Troop Deployment

The aerial escalation came alongside sharp diplomatic remarks from Russian Foreign Minister Sergei Lavrov. Speaking at the International Festival of Youth in Yekaterinburg on Wednesday, Lavrov said Russia would regard the deployment of Western troops on Ukrainian territory as a declaration of direct war.

'Let me emphasise that we have no interest in getting involved in this, but if Europe, which talks every day about preparing for war against Russia, attacks the Russian Federation, that will be a completely different war, and it will be very short,' Lavrov said.

Lavrov added that Moscow remains open to a diplomatic settlement, including in the trilateral format the United States had again proposed, but insisted that any resolution must fulfil Russia's stated objectives and 'eliminate the root causes' of the conflict — framing that critics argue rules out meaningful compromise.

What This Means for Aviation and the Conflict

The diversion of TK407 is a visible indicator of how the Ukraine-Russia war is reshaping civilian aviation. Turkey occupies a rare position as a country that has maintained active flights between Moscow and Istanbul throughout the conflict, making its disruptions particularly notable. Airlines from most European countries and the United States have avoided Russian airspace entirely since 2022.

With drone campaigns of this scale now targeting the Moscow perimeter, pressure on remaining carriers operating Russian routes is likely to intensify in the coming days.