From my experience, JetBlue prices to and from popular destinations have always been the lowest when first released. Unlike most others airline, including Southwest I have found they go down at some point. Southwest has always been the lowest. Ive paid between $180-$220 roundtrip out of NY area the last two years in the Month of May.
I am waiting for JetBlue to release for November. I have AMEX points to transfer to my TrueBlue account so I am anxious.