It is difficult to answer the question Which travel destinations are cheaper from the U.S., is it Asia or Europe? because there are a number of factors involved.
The first is how are you going to travel to Europe or Asia? Given that the United States is separated from each by oceans, you will have to travel by either airplane or ship. A ship will obviously take longer but, prices of the two may not be that much different.
The next major factor to consider is the cost of food and lodging at your destination. Obviously these costs will vary widely depending upon whether you stay in a luxury resort, an inexpensive hotel, a youth hostel or something in between,I t will also generally vary depending upon whether you stay in major cities or smaller cities or towns.
