FWIW, I've been price checking for Labor Day weekend for a while now. JFK-LAX/LGB
At one point it was well over $500 on all airlines. A couple weeks ago I caught it below $400 and grabbed it immediately. I'm not sure if that was a glitch or just pure luck but seems like a big price discrepancy since they're back in the $500 range now. I'm flying JFK-LAX and then LGB-JFK. All EMS seats.