Russian airline Transaero’s departures are moving to Heathrow Terminal 4.
The switch from Sunday (October 26) is due to the forthcoming closure of Terminal 1 at the airport.
Terminal 1 is set to be shut next year as part of a transformation of the airport which saw the new Terminal 2 open in the summer.
Transaero runs flights between Heathrow and Moscow Vnukovo airport.
The airline is starting flights to St Petersburg from the London hub on October 29.