Hello Katblu!!! I grew up 100 miles north of you on a ranch near Grass Range. We bought our groceries once a month in Billings.

Don't worry about your son. It is easy to do the whole thing using the metro. If that worries you then hire Aerocity . It costs more but they will deliver him directly to the bus station.

I have done both and prefer using the metro. I buy the 10 pass card because we always end our trips in Madrid and it is easy to have. Tickets are easy to buy and the metro is easy to find. The only catch is if he has more luggage than he can easily carry. If that is the case then he should use Aerocity.

Feel free to email me or call if you need to talk about it.

By the way, I would probably NOT use a taxi because their pricing can be a bit sketchy. Metro pricing is set and Aerocity will give you a firm price which you pay in Euros once you get to the bus station.

Is your son going to attend school in Spain?