No this is not from the Onion.

A stowaway crocodile on a flight escaped from its carrier bag and sparked an onboard stampede that caused the flight to crash, killing 19 passengers and crew.

Croc caused plane crash, says survivor. A plane crash in the Congo that killed 20 people could have been caused by an escaped crocodile.

The croc had been hidden in a passenger's sports bag - allegedly with plans to sell it - but it tore loose and ran amok, sparking panic.