Dutch Railways (NS) operates a train from Heerlen to Düsseldorf every 30 minutes. Tickets cost $6 - $11 and the journey takes 14 min. German Railways (DB) also services this route hourly.
How to get from Heerlen to Düsseldorf
From Heerlen train to Herzogenrath then train to Düsseldorf Hbf. 1 h 45 min 31€. From Heerlen, Theater bus to Aachen Hbf then train to Düsseldorf Hbf. 2 h 55 min 31€. From Heerlen drive to Düsseldorf. 55 min 14€.