Spain-Santiago de Compostela

By walking or by train?

Three direct trains per day take only 5 hours from Madrid Chamartin station. Looking Up Train Schedules and Routes Online gives you the DB train schedule link and tips for using it. www.renfe.com is the national railway. If you want to check flights, try www.skyscanner.com.

I always drive and stop along the way to see some smaller towns and castles.

I would take the train. Quick comfy, 6 hour ride.

Thanks for all the replies. Good to know time from Madrid to Santiago on train.