my advice is to go with the low bidder for 1 intl flight the 1st year....if they have a ff program, sign up....
the next year evaluate again based on cost and the ff program you're in if you are still in school....
you don't say what the route is that you will fly....that might make a difference, nor do you say what country you plan to be in after school....
at this point, i believe that it isn't worth much effort on you're part....
good luck....