Several air carriers offer cheap tickets to Geneva.
From Genève Aéroport you have a good train connection to Fiesch, a village 5 minutes away by bus from Niederernen.
Plan your trip by train from Geneva Airport.
In Fiesch you can take the bus to Ernen; get off at stop Niederernen.
Look at the Sportbus schedule in winter and the regular bus schedule in 2016.