I flew JetBlue from Seattle to upstate NY a few weeks ago and had a great check in experience while my friend was waiting in a lonnng line at Northwest. Anyways, they can't expand to HI with their existing fleet of airplanes I was told when I joked about how much easier it was dealing with them than when I had flown United from HI a few weeks earlier. Their Airbus fleet is not safety rated for overwater flights of that distance was the bottom line.