A United Airlines flight bound for Newark had to make an unscheduled stop in Denver due to a mechanical issue, officials said.
Flight 1640, a Boeing 757-200 that originated in Los Angeles, landed safely in Colorado at 11:43 a.m. Mountain Daylight Time and passengers exited normally, according to United.
It then departed Denver at 1 p.m. and is due to touch down at Newark Liberty International Airport at 6:43 p.m. local time.
The flight, which took off from Los Angeles at 7:45 a.m. Pacific Daylight Time, was originally scheduled to land in Newark at 4 p.m. local time.
NBCNewYork,com reported that the plane had to be diverted to due "fumes" or a "peculiar smell."
The Federal Aviation Administration didn't immediately return message from NJ Advance Media seeking information.
Jeff Goldman may be reached at jeff_goldman@njadvancemedia.com. Follow him on Twitter @JeffSGoldman. Find NJ.com on Facebook.