Depends on where you are flying from. If you are out of the Pittsburgh area USAirways is actually the cheapest.
If you are out of Boston, those folks fly Jetblue and say the price is great.
Usually I decide when I am going and then start checking all the airlines as well as the travel sites....if you watch you can usually get a great deal no matter where you are flying from....good luck !!!
Welcome to the forum...sitting here; looking at all the snow...not a huge amount...2 or 3 inches; but, still makes one think..."Boy, I would love to be on the beach in Paradise," aka "One Happy Island...Aruba." Freeze tonight; icy roads tomorrow...a huge sigh from N. Virginia.