I was just thinking about this because my older teen dd has gone on a solo trip in Europe. She is feeling a bit low and regretting planning to be away for two weeks. Anyway, I was giving her a bit of a “you just have to deal with it” pep talk but later thought - actually, if she is really not enjoying it, she could just book an earlier flight home?
I have personally never done that but have had a few trips over the years where I wished I could have cut them short.