Direct proof of use
The Su-35S is directly documented in the Syrian theater through Russian Defense Ministry statements reported by TASS. On 1 February 2016, TASS quoted Defense Ministry spokesman Igor Konashenkov saying that super-maneuverable Su-35S fighters had started combat missions at Khmeimim airbase the previous week.
The aircraft's continued Russian airspace-control role over Syria was later documented by U.S. military releases. DVIDS published U.S. Air Forces Central footage from 2 April 2023 describing a Russian Su-35 intercept of a U.S. F-16 in coalition-controlled airspace over Syria, and AFCENT published July 2023 imagery and a statement describing Russian fighters, including Su-35 aircraft in the released imagery, harassing U.S. MQ-9 drones during an anti-ISIS mission over Syria.
Sources: TASS Su-35S Combat Missions, DVIDS Su-35 F-16 Intercept, AFCENT July 2023 Syria Incident
Timeline
Russia acknowledged the Su-35S deployment shortly after late-January 2016 media reports placed the aircraft in Syria. TASS reported on 1 February 2016 that the Su-35S had begun combat missions at Khmeimim, and a 4 February TASS feature again described the aircraft as redeployed to Syria and operating from the Russian airbase.
U.S. releases in 2023 show that Russian Su-35 activity over Syria did not remain limited to the opening deployment period. The April 2023 DVIDS video places a Russian Su-35 in an intercept against a U.S. F-16 over Syria, while AFCENT's 5 July 2023 release describes Russian fighters interacting unsafely with U.S. MQ-9 drones and identifies the Su-35 in accompanying imagery.
Sources: TASS Su-35S Combat Missions, TASS Su-35S Syrian Skies, DVIDS Su-35 F-16 Intercept, AFCENT July 2023 Syria Incident
Narrative
The Su-35S entered Russia's Syria air group after a period of heightened air-defense and airspace-security concerns. TASS reported that the aircraft arrived after renewed Turkish accusations of Russian airspace violations and after Russia had tightened security in Syria following Turkey's November 2015 shootdown of a Russian Su-24M. The same TASS report noted that Khmeimim already hosted strike aircraft, Su-30SM fighters providing cover, the S-400 system, and naval air-defense support.
In the Syrian Civil War context, the Su-35S therefore appears primarily as a Russian fighter used for combat missions, force protection, and airspace control around Russia's expeditionary operation rather than as a separately documented strike aircraft in the available direct sources. TASS carried Russian commentary that the Su-35 could perform tasks against both air and ground targets, but the directly cited Defense Ministry statement supports combat missions from Khmeimim rather than a specific Su-35 ground-strike incident.
The later U.S. military material documents a different slice of the same theater role: Russian Su-35 aircraft operating in contested Syrian airspace near coalition aircraft. Those releases describe intercepts, deconfliction violations, and flare or afterburner maneuvers around U.S. aircraft, supporting the Su-35's continued use as part of Russia's patrol and airspace-control posture in Syria.
Sources: TASS Su-35S Combat Missions, TASS Su-35S Syrian Skies, DVIDS Su-35 F-16 Intercept, AFCENT July 2023 Syria Incident