My wife and I come to Las Vegas in the spring and fall for 10 days and fly Jet Blue from New York (JFK). We leave New York in the A.M. and return early after noon. This year we have a price problem. We are booked for our usual Tuesday flight at 9:55 a.m. for $145 each. Our usual Thursday flight home was shoeing $339 but just jumped to $389 each. They show plenty of seats available. Does any one know some thing about Thursday April 9 to cause this. Thank You.