I am not sure bitcoins are already useful for the day to day life. It's not that common yet. But there are places (hotels, etc) that are starting to take them:
- http://bitcoin.travel/ - Check this website. Filter, for instance by accomodation.
The coin is definitly spreading. Even in rural areas where you would expect it to appear later. A nice example is for instance this nature resort in Portugal
I am not sure about airplanes, but you can definitly fly to space with bitcoins, according to this article.