Fullington Trailways operates a bus from Allentown to King of Prussia Mall twice daily. Tickets cost $13 - $20 and the journey takes 1 h 30 min. SEPTA also services this route every 30 minutes.
How to get from Allentown to King of Prussia Mall
From Allentown, PA bus to Philadelphia, PA, walk to 13th St & Market St - MBFS, line 124 bus to Mall Blvd & Wills Blvd - MBFS, then walk to King of Prussia Mall. 2 h 47 min $20. From Allentown bus to JFK Blvd & 17th St, line 124 bus to Mall Blvd & Court Blvd, then walk to King of Prussia Mall. 3 h 1 min $24. From Allentown drive to King of Prussia Mall. 54 min $6.