My suggestion would be fly to Girona. You then have a couple of options. A loop to the west towards Olot and back (taking in the Via Verde cycle track if you want, or stay on the roads), good scenery (hills and forests), nice roads, nice small towns and villages.
Or a loop from Girona over to the coast around St Feliu de Guixols, giving a different type of scenery, forested hills, farmland, and coastal views. The Via Verde cycle track also goes from Girona to St Feliu de Guixols.
Girona is a very nice town to spend a night or two in. The airport is easy to cycle out of, with a reasonably quiet rural road leading from it.