I have booked a specific train ticket (discounted) from DUS flugh to Frankfurt Main Hbf. The first part of the trip is from DUS Flugh to DUS Hbf on an ERB (regional bahn). Does anyone know if I could use this ticket to catch an earlier regional train for the first part of the trip (DUS Flugh to DUS Hbf) to give me additional time for the transfer at DUS Hbf? I realize the ticket is train specific, but I was wondering if that did not apply to the regional train, only to the ICE train from DUS Hbf to Frankfurt Hbf.
Thanks for any help!