Aeroflot's official website reports that in December of this year, Aeroflot will transfer some flights to Bangkok and Colombo to its subsidiary Rossiya Airlines.

“Passengers holding tickets for flights SU276/277 with departure dates after December 10 will be "The tickets have been automatically rebooked on Rossiya Airlines flights. Those who do not wish to travel on Rossiya Airlines flights have the following options: refund the ticket at the point of purchase; or rebook the ticket on other Aeroflot flights on the same route within five days of the original departure date," the statement reads.
Aeroflot reports that the flights will be operated on Boeing 777 Rossiya aircraft. The planes will depart from Terminal D of Sheremetyevo Airport.
Source: trn-news.ru