A whopping 91% of British citizens have traveled abroad for vacation, compared to 50% of Americans. Perhaps because of the size and diversity of climate within the United States, many Americans do not feel compelled to leave the country for vacation.

Perhaps it's the proximity to Europe and relatively inexpensive flights (and rail) that can explain those numbers. Having lived in England, I can say that travelling to Paris by rail (Today's price = $175 USD) is affordable. Today's price for a flight (Easyjet) from London (UK) to Alicante (Spain) is only $112 USD. With rock-bottom prices like that, why wouldn't our cousins leave lovely England on holiday?

Good point. An interesting comparison would be how many have traveled more than 500 or 1000 miles. With the number of Americans headed to Disney I bet we travel just as much. We just don't leave our American fantasies behind.