By train
From North and West Europe, to Basel or Zurich, then via Bern - Brig to Domodossola. Here you change to the local train direction Novara; get off in Pettenasco (Domodossola - Pettenasco = 1 hour)
From East and South Europe, via Milano or Torino to Novara. Here you change to the local train direction Domodossola; get off in Pettenasco (Novara - Pettenasco = 1 hour)
From the train station Pettenasco, Pratolungo can be reached in about a 30 min. walk.
If you prefer to take a taxi, you should get off the train in Omegna or Orta.