Water and broom travel

[Bill Hack]

No: HPFGUIDX 44647

Does wide open water act as an insulator, and ban the use of brooms? 
Example, first transatlantic flight by broom in 1933. Since even 
muggles did it in hops in 1919, and non-stop in 1927, is there a 
reason? Do the Weasleys go to Egypt or Romania via Floo-powder or 
train? 
 
 It just strikes me that the reason there aren't any Yanks at 
Hogwarts is simply the difficulty of trans-oceanic wizard travel.

Viper3082002