The earth spins at approx 1000kts/hr. Concorde flies at approx 1000kts/hr. It takes off from JFK and flies towards LHR which is moving away at the same speed Concord is flying towards it. How does it ever arrive? Equally, it takes off from LHR and flies towards JFK, which is coming towards it at the same speed; i.e. they have a closing speed of 2000kts/hr. So why does it still take 3 hours?
Now I'll put the cork back in the rum bottle and try to stop the house spinning. Hopefully that will cause my brain to slow down too, relatively.