Hey Carole-
Check out the iberia website. I just found fares for $290 r/t from JFK, so I'm sure there are specials from other airports too. (I haven't tried to actually see if the dates I want are available, but they are advertising them and you could call and see if they can help you out...) I think the fare says you have to buy by 2/28 though...
Oh, and being GranadaGirl, I feel I have to chime in on the best time to visit Granada/Andalucia even though it's been nearly beaten to death already!! Although it's beautiful ALL YEAR, I'd particularly choose March/April/May...once June/July/August come around it's waaaaay hot & humid...and in the spring the gardens & Generalife at the Alhambra are so beautiful. If you haven't been to Granada for a while, there's also a fairly new park on the Camino de Ronda (across town from the Alhambra, near HiperCor!) which is dedicated to Federico Garcia Lorca. We were there for Semana Santa last year, and it was already beautiful, I can only imagine how gorgeous it'll be at the end of April and May!!!
Buena suerte!!
-GG
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"Vivir con miedo es como vivir a medias."