Welcome to Turin
This cache is placed here as myself and my partner often visit Italy to stay with family and ski the local areas.
I also have the cache 'Welcome to Bari'
For this one all you need to do if you have a spare 10 minutes before boarding or after landing is exit the main entrance to the airport, turn right walking past the coach drop off area and towards the road that winds down to the bottom level staying on the right handside walkway.
Once at the bottom it's pretty quiet down there giving you ample time and opportunity to grab this cache.
No pen here so you will need to bring one :-)
Good luck