Has anybody identified which flight that is?
Because the flight data websites will let you go back in time and see what other plane was in the air nearby where Q could have photographed the JetBlue plane. If we identify the Jetblue flight, then from that, we can identify the flight carrying Q and the destination of Q's flight.
You missed the fact that CDAN is about Hollywood and the blind says that it was an A-list celeb. Most likely an actor or singer. And from the sound of it, if the murder happened in the USA, he was a foreign celeb.
That is SJC, San Jose International. The plane's wheels are up so it is taking off. If you take off from SJC to the northwest, you go over the wetlands at the south end of San Francisco Bay. That looks like the Eden Landing Ecological Reserve in the photo.
If the plane was squawking then it can be identified by going through the flight history data that the planefags are always showing us. Just have to find that jetBlue plane taking off at SJC on May 2 at the same time.