So it turned out that the diverted flight was actually due to a phony bomb threat by the same hacker group nulled the servers for LoL, WoW, Hearthstone, PSN, Xbox Live and AT&T. Classy...
There was a flight from Texas to California that was diverted due to a phony bomb threat. It was believed that the particular flight was chosen due to the presence of John Smedley, the president of Sony Online Entertainment. The FBI are investigating this and related DDoS attacks.