yxhu

chances for getting a discount for a single journey is very low,
although you may get 50% discount for a return journey if you book well in advance.
i faced the same problem 3months ago,
but fortunately, there was that "sommer-spezial angebot" at that time.
the better solution might be renting a car for a day,
if you have a driving license or have a friend that has one.