https://en.wikipedia.org/wiki/List_of_Air_Nostrum_destinatio...
Even within Spain the Balearic islands and Canary islands are very popular destinations and probably not going to be on any high speed rail network any time soon. :-)
They also have good comparisons here: https://www.hybridairvehicles.com/news-and-media/overview/in...
Edit: I suspect the idea of flying around in airships looking up a huge volcano is just reminding me of Red|Green|Blue Mars.
That's not even talking about the fact that the lines don't even all connect to each other at Paris. They often terminate in different stations necessitating cumbersome travel from one station to the other.
If you check the population centers in Spain, it clearly should have the form of a bike wheel (full circle and radials), but it is an asterisk.