How far in advance do you need to buy your place tickets?  A recent study looked at the timetable for cheap flights all over the world. Here are seven destinations, and when to book:

1.  Anywhere in the U.S=54 days in advance.  

3.  Mexico and Central America=61 days in advance

4.  The Caribbean=76 days in advance

5.  Europe=99 days in advance

6.  South America=81 days in advance

7.  Asia and the South Pacific=90 days in advance

8.  The Middle East and Africa=119 days in advance.