JetBlue has a 3-day sale beginning today and ending Wednesday, with flights from Los Angeles to Las Vegas only $39 one-way.Okay, it isn’t technically L.A., but Long Beach, which is JetBlue’s hub and not too far from Los Angeles.  Flights to and from Burbank are also the same price.Their regular price for the same route can be had for about $54 each way.You must purchase before 9 p.m. on April 13, for travel April 26 through June 22, excluding Fridays and Sundays.