Ak Bars Aero is to inherit assets from Tatarstan Airlines following the latter's shutdown by the Russian aviation authority.
Rosaviatsia has served notice of its intention to withdraw the air operator's certificate from Kazan-based Tatarstan on 31 December.
Now, Ak Bars – based in the same region – says it will promptly take over the operation of Tatarstan's fleet, along with its route rights.
This will bring four Airbus A319s and around a dozen Cessna 206s under Ak Bars' wing.
Ak Bars will also get back 14 leased Bombardier CRJ200s it previously handed over to Tatarstan under a planned merger and role-split scheme.
During the first 10 months of this year, the two carriers' combined passenger numbers exceeded one million.
Since the loss of one of its two Boeing 737s on 17 November, Tatarstan has reportedly returned the other.