1 2
MeggPhaggSiouxSo, there are truly no difference between "a vacation to" and "a vacation in"?
No really important difference that I can think of.

MeggPhaggSiouxWhat should I do?
Above all else, stop worrying about it. Emotion: smile

Neither "to Europe" or "in Europe" imply the vacation started or ended in Europe. "vacation" implies going somewhere else and returning, so a vacation "to" or "in" Europe implies the vacation started and ended in some location outside of Europe. It's possible that "to" may sound a little more forceful to some people, but I don't think that's very important.

Students: Are you brave enough to let our tutors analyse your pronunciation?