Reading about the cheapest F class ticket between cities in the UA forum got me to thinking. I will be travelling to both these cities using an award later in the year. I plan to fly from the U.S. to BA and spend some time in Argentina, then travel to Uruguay and fly home from Montevideo. However, what is the most reasonable way to get from BA to Montevideo in the middle of my trip? Many years ago I took an overnight ferry. I have heard there is now a hydrofoil? Has anyone experienced this or can someone advise me as to the most reasonable way to travel between the two cities?