A friend and I almost did a travel-search startup, but I'm we didn't, we wanted to do something like Wanderfly (before we knew it existed). Seems like Wanderfly made somewhat of a pivot though, so that either means the idea (of selecting interests and a price range or even certain geographical areas and doing relevant searches) didn't work at the time, at all, or the execution was flawed. I very much doubt that bad execution was a factor, it looked very good to me.