University of Denver has a fantastic study abroad program; I think last year, it had the highest percentage of graduating students who had studied abroad of any school in the US (76%, maybe?). The Cherrington Global Scholars program allows you to study abroad for the same cost as attending DU (a few costs are not included, but they even pick up the airfare). If you get merit or need-based FA, it applies even while you are abroad. DU is also pretty good in International Relations, I understand. They have about a zillion different study abroad programs (where they have established partnerships with specific schools), all around the world, or will help you do an independent arrangement if you want to go to a different school. If you go to du.edu/abroad you can search the different programs and read about Cherrington.