A 78-year-old woman died onboard a flight to Salt Lake City, but no one noticed until after the plane landed.

The woman was traveling on a flight from Ft. Lauderdale last weekend. Because of fuel problems, the plane was diverted to Dallas, where it was on the ground for about two hours.

It wasn't until the plane was on the ground in Salt Lake City and the woman didn't get out of her seat that the flight crew and other passengers noticed the woman had passed away.

It's not yet known what time during the trip the woman passed away.

An autopsy is being performed to determine time and cause of death.