With only 1 stop(i.e. UMB/Ambala Cantt Jn) between LDH/Ludhiana Jn and DLI/Delhi Jn this train can easily be given to DUI/Dhuri Jn-JHL/Jakhal Jn-JIND/Jind Jn-ROK/Rohtak Jn route after LDH as this route lacks trains to/from ASR/Amritsar Jn.
12379 reaches DLI @09:00 AM. Passengers can use 22429/DLI-PTK SF before departure of this train and 12925/Paschim SF after departure of this train to reach UMB.
...
more...
12380 reaches UMB @05:15 PM. Passengers have 2 options to reach not only DLI but NDLS as well: 12920/MALWA SF for NDLS and 14218/Unchahar Exp for DLI.