I went from Traverse City, MI to Long Pond, PA on a G650 in 25 minutes. How fast was it flying?

Mach I =780 mph. It's 781 land miles from Traverse City to Long Pond. Obviously you can't fly Mach 1 over land, or I'd been there in about 2 minutes from take off. I'm not a math major. Someone smarter than me figure this out.