I feel your pain. I'm ready to book for July, but Delta has been over $1000/pp r/t from MCI. In the past I'ts always been in the $600 range. Delta is my preferred carrier because I have status with them and can generally either significantly reduce the cost or upgrade the tickets. Frustrating.

As it stands I'm leaning toward SWA to San Juan, charter to EIS and Delta home from STT. Using various points even with the charter it would be cheaper than Delta to STT R/T for the three of us.