My calculation.
Diameter of the earth, about 24,000 miles.
Length of day, 24 hours. Duh. It needs to go about 1000 miles an hour. Faster than commercial flights.
I don’t know if there’s an aircraft capable of sustained speeds of 1,000 miles an hour.
Concorde does 1350. But how can it be refueled in flight several times? Has this venture ever been done by a military jet?