Government and industry officials told Reuters.
Sources say the exact time is still unclear but is expected within the next 24 hours.
Late on Tuesday, United Airlines said it was suspending flying in Russian airspace, along with other major US airlines that have taken the step following Russia’s invasion of Ukraine.
The White House, which declined to comment, has held extensive talks with US airlines in recent days.
United has continued to fly over Russian airspace to make a number of flights to and from India in recent days. Delta Air Lines, American Airlines and United Parcel Service all confirmed this week they have suspended flights over Russia.
FedEx on Tuesday did not respond to an email asking if it would stop flying over Russia.
United will cancel two flights to India on Tuesday and Wednesday as it assesses how it can continue to operate via another route that does not use Russian airspace.
White House officials have separately asked whether the move would harm US supply chains or have other negative effects, the sources told Reuters.
