Ukraine formally notified the International Civil Aviation Organization (ICAO) on 2 September that Russian airspace is unsafe for civilian flights because of increased military activity, Ukrainian Foreign Minister Andrii Sybiha said. The letter behind the notification asks the organization to urge its member states to stop civil flights over Russia altogether, ZN reported.

ICAO, the UN aviation agency, cannot close Russian airspace or order carriers to reroute. European and US airlines already avoid Russia's airspace, while carriers from China, Türkiye, and the Gulf states have kept flying through it. Those remaining airlines must assess the safety of flying amid drone and air defense operations. Drone alerts during reported Ukrainian attacks have repeatedly shut Russian airports and delayed hundreds of flights.

The notification follows a 1 September warning by Ukrainian President Volodymyr Zelenskyy, who told airlines, insurers, and other aviation stakeholders that Russian skies were becoming unsafe as Ukrainian drones reached deeper into the country.

Zelenskyy said Ukraine's Foreign Ministry would pass information about the risks to international organizations. The letter to ICAO came from another office—Mykola Kalashnyk, Ukraine's minister for recovery, infrastructure, and transport, whose portfolio covers aviation.

Russian President Vladimir Putin said Zelenskyy's statement amounted to "a bid for state terrorism" and that Moscow would find a way to respond if civilian "tragedies" followed.

Sybiha urged airlines to avoid Russian airspace and said the notice was meant to prevent unintended incidents, arguing that Moscow was failing to disclose the dangers its war had created. He invoked Ukraine’s inherent right to self-defense under Article 51 of the UN Charter, the provision that recognizes states’ right to defend themselves against an armed attack. The foreign minister further stated that the war was “returning home to Russia.”

In its separate statement, ICAO warned of rising threats to civil aviation worldwide. It did not mention Russia, endorse Ukraine’s assessment, or say Kyiv’s notification had prompted it.

The UN aviation body identified long-range weapons, drones, navigation-signal interference, and advanced air-defense systems as growing dangers to civilian aircraft. It reiterated that international aviation law prohibits the use of weapons against them.

ICAO urged member states to assess airspace under their control, share threat intelligence quickly, and improve military-civilian coordination.

Russian airports were already facing repeated closures

Russian airspace has not been legally or completely closed. The disruption has instead taken the form of temporary restrictions at individual airports.

From 5–7 May 2026, restrictions during reported Ukrainian attacks delayed more than 450 flights at Moscow airports, while limits at Vnukovo remained in place for nearly 18 hours.

On 6 July 2025, Moscow's Sheremetyevo airport canceled 171 flights, while airports in five other cities suspended operations. During an earlier wave on 22 May 2025, Domodedovo halted flights four times in one day and Sheremetyevo three times, while Vnukovo and Zhukovsky also restricted operations.

Airports in Kaluga, Nizhny Novgorod, Saratov, and Tambov were temporarily closed during a 27 May attack in which Moscow claimed 99 drones were intercepted. Two days later, another alert delayed 20 arrivals and 14 departures at Vnukovo, pro-Kremlin Telegram channels claimed.

Russian President Vladimir Putin said Moscow would “find a way to respond” if civilian “tragedies” followed President Volodymyr Zelenskyy’s warning that Ukrainian drone operations were making Russian skies unsafe. Zelenskyy told foreign airlines and insurers that the “safe moments” in Russian airspace were over.

Zelenskyy’s warning seeks to extend the cost of Russia’s war beyond damaged military and energy facilities to airlines, insurers, and travelers. It does not mean Russian airspace is legally or completely closed. However, carriers that continue flying over Russia face higher costs from repeated airport shutdowns during drone alerts, as well as the danger that military activity in Russian airspace could endanger civilian aircraft.

Putin spoke after a 1 September Shanghai Cooperation Organization summit in Bishkek, where Russia and China coordinate regional security. Zelenskyy’s warning amounted to “a bid for state terrorism” if he had made it publicly, the Russian president said, adding that Russia does not negotiate with “terrorists.” Putin also said Russian forces were preparing massive strikes on Ukraine’s energy infrastructure.

In his evening video address, Zelenskyy said Ukraine did not threaten civilian aircraft but would keep striking Russian military targets and parts of the economy supporting the war. Ukraine’s Presidential Office head Kyrylo Budanov backed the decision, saying long-range weapons would systematically strike military targets in Russia while the invasion continued.

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“Russian airspace will effectively be closing”: Zelenskyy warns airlines Russian skies are no longer safe

Shares in Aeroflot, Russia’s national airline, fell to an intraday low of 30.36 rubles at about 20:40 Moscow time, down 5.11%, Meduza reported, citing Moscow Exchange data. The timing does not establish that Zelenskyy’s speech alone drove the decline.

Wall Street Journal correspondent Yaroslav Trofimov posted a chart of the decline on X, writing, “Aeroflot shares after Zelensky’s warning.”

European and US carriers already avoid Russian airspace, but airlines from China, Türkiye, the United Arab Emirates, and other Gulf states continue using it, Reuters reported. Aviation-risk firm Osprey Flight Solutions assessed that daily attacks deep inside Russia were nearly certain through 2026 and warned of possible misidentification.

Andrii Kovalenko, head of Ukraine’s Center for Countering Disinformation, said it was “strange” to hear terrorism accusations from “the leader of a terrorist organization masquerading as the Russian state.” Putin’s reaction showed Moscow feared pressure on its airspace, he argued.

Previous closures of Russian airspace due to Ukrainian attacks

Russian airports were repeatedly shut during Ukrainian drone alerts well before Zelenskyy’s warning. On 6 July 2025, Moscow airports canceled 171 flights while airports in five other cities suspended operations.

A 27 May attack closed airports serving Moscow and several other cities after Russia claimed it intercepted 99 drones. Another wave caused flight disruption and mobile internet outages around Moscow, while a 29 May alert again halted flights at Moscow airports.

More recently, Russian authorities restricted operations at Moscow airports during Ukrainian drone attacks, delaying more than 450 flights