FAREPAY Reloadable Card: Use of the FAREPAY card on Ski bus do not receive discounts on these services. SLC local FAREPAY card holders save 20 percent off local bus, TRAX, S-Line and up to 20 percent off of FrontRunner and Express Bus fares. FrontRunner savings vary between 17 and 20 percent, depending on distance traveled. Save 18 percent off Express Bus fare. FAREPAY cards cannot be used on Paratransit. Purchase card here.