Why and when to visit
Because you need a 4-5 days to break to a place where food tastes a bit more dramatic than your usual office lunch and things are moving a bit slower. I would choose a period when there is pleasant weather to enjoy hiking in the country and going to the beach.
Getting there and around
The closest airport is Asturias airport. Book a car, you will need it to get around. I use Rentalcars and has never failed me.
Leaving the airport behind kick off your journey with a quick stop at Avilies town. Try some traditional Sidra and seafood at Casa Lin. It will not let you down. If one was not enough, worry not! There are plenty of sidrerias to choose from in Oviedo and Villaviciosa.
I would recommend booking something in Oviedo town since there are more places open in the evening, alternatively, you could split your stay in near towns such as Luarca or Villaviciosa.
Asturia is famous for its apple cider, called Sidra. Because of this, you will find many traditional Sidra bars and restaurants in the area. Swimming at Terrazas Ipanema Gijon. Day hikes along Ruta Molinos at Villaviciosa. Roam around Oviedo’s old streets. Visit the Museum of Fine arts of Asturias.