Since Pfäffikon is within the Zürich metropolitan area, it is served by its suburban trains Zürich S-Bahn. The S2, S5 and S8 lines all offer 2 trains per hour to Zürich Hbf, of which the S2 is the fastest 35 min, followed by S8 42 min and S5 45 min. S2 and S8 use the same route to Zürich Hbf; however, S2 makes limited stops along the line and S8 all stops. It is also possible to use the S2 to get to Zürich Airport 50-55 min. All-zone day and monthly cards are fully valid see (http://www.zvv.ch/en for more information). Don't go to Pfäffikon ZH by mistake!
Also, IR-trains and IC-trains to Chur and Basel have hourly stops.
If you prefer the car then the Autobahn A3 to Chur/Zurich brings you to Pfäffikon. Keep in mind the loads of commuters so in the morning and evening rush hour it might take 10-15 minutes more as the main road Churerstrasse is utilized beyond it's capacity. There is also the entry/exit Schindellegi on the A3 but entry is only in the direction to Chur and exit in direction to Zurich not both ways!
