On 30-10-20 the service life of RA-85757 will expire, this is the last civil Tu-154 flying pax in Russia, It belongs to Alrosa.
It is unlikely that they will extend the service life and rumours from Russia suggest the last flight already took place:
https://vk.com/tupolev_tu154?w=wall-173285_24611%2Fall
The only other option to fly a Tu-154 is booking a tour to North Korea with https://www.juchetravelservices.com/the ... ion-tours/
The 2020 tour is cancelled because of the covid.