You can check Flightaware and enter the tailnumber of White Knight 2.
Latest flight details 25th of June 2020.
Furthermore, no activity in arrivals or departures on Space Port America during this weekendbreak whats so ever.
I expect incoming planes on Monday and Tuesday with personell and board members, maybe even Richard Branson.
Keep a close eye at Spaceport america as airport in flightaware app😉