Russian officials have suspended all flights to Egypt following speculation the downing an Airbus 321 operated by Metrojet last Saturday.
The latest move follows indications the crash near Sharm el-Sheikh was caused by a bomb.
Militants linked to the Islamic State group in Iraq and Syria have claimed responsibility for the crash.
The flight was on route from Sharm el-Sheikh to St Petersburg when it came down in Sinai.
Most of the victims were Russian.
Russia is also working to repatriate as many as 45,000 Russian holidaymakers currently in Egypt.
At the same time the UK estimates that 19,000 of its nationals remain stranded in Sharm el-Sheikh.