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 accommodation.
The coin is spreading. Even in rural areas where you would expect it to appear later. A nice example is for instance this nature resort in Portugal. You can find their page about bitcoin payment here (Portuguese).
I am not sure about airplanes but according to this article you can definitely fly to space with bitcoins, .