Customers could then switch to PATH, which was cross-honoring their tickets at Newark, Hoboken and 33rd Street in order to get to the area.
No injuries were reported after a mechanical problem caused the derailment just outside Penn Station, the agency said.
The train derailed just before 7 a.m., NJ Transit tweeted.
Results included LIRR delays in and out of Penn.
Click here to follow Daily Voice Englewood and receive free news updates.