Straightline, as the bird flies, mostly over the Atlantic Ocean, about 4535 miles / 7299 km. 10 hours or so in a large airplane, that's assuming you could find a direct flight.
How Far Is It Between Orlando, Florida And Amsterdam In The Netherlands?
I just did Orlando to Amsterdam on Martinair Holland in February. Getting there it takes 8 to 8.5 hours getting back because of jet stream.. an hour to hour fifteen longer and is 4500 miles.