Once the aircraft were refueled in the air over the Novosibirsk region, two more times - over the Perm region. Refueling was carried out using IL-78, which at the time of the fuel pumping process was at a distance of 10 m from the MiG-31BM.
From the statement of Yaroslav Roshchupkin:
Currently, the crews of the 14 Army of the Air Force and Air Defense of the Central Military District are the only ones who practically carry out long-distance flights on the MiG-31 with three refueling.
In total, when changing the home base, the planes traveled about 8 thousands of kilometers. The record for flight duration on MiG-31BM airplanes is now the 7 hours mentioned in the 4 hours mentioned above.