What airport will you be flying from?

Are your travel dates flexible?

June shouldn't be very expensive for flying but it will be a little more expensive than last year due to oil prices.

Do you have any points you can use? What sites have you been looking for airfare on?
Don't buy this early, wait one more month, you want to buy two months out when the price is lowest.

Google.com/flights has great search software to find the lowest price.

Bing.com/flights has a nifty tool that lets you see what people paid in the past for the same route/time and gives recommendations on whether to buy now or wait.

Going with the AI resort+airfare is RARELY worth it, usually there are additional fees to make it more expensive especially if you don't really "want" the AI experience.