As of spring 2019, there have been 116 officially confirmed Russian Armed Forces fatalities in the war.
[9] Also, two investigative groups, Fontanka and the Moscow-based Conflict Intelligence Team (CIT), reported a conservative estimate of at least 73–101 private military contractors (PMCs) being killed between October 2015 and mid-December 2017,[10] 40–60 of whom died during the first several months of 2017, according to Fontanka[11] and one more PMC was killed in late December 2017.
Estimation of casualties varies with some sources reported up to 200 Russian contractors died during the strikes.
[18] In addition, at least 23 fighters have been killed that were possibly regular military, but their status has not been officially confirmed.
[19] On 25 December 2016, a Russian military Tupolev Tu-154 with 92 people on board crashed in the Black Sea during a flight from Sochi International Airport, Russia to Khmeimim, Syria.