One answer for increasing airfare............
I usually book my trips to CTI around Feb. or March for the following year. I boo the June '11 trip in March '10 and just booked the June '12 trip about two months ago. This year I started watching airfare around Oct/Nov'10. We fly non-stop on Continental from Houston to MoBay. It was around $500 pp then. About a week later it jumped to $918. I was not worried as it always does that and then comes back down. In late Feb "11, it was still up. I began to get worried as paying almost $200 for airfars was not in my plans.
I began to look to change dates. We originally scheduled June 5 - 15, but I thought 4 - 14 or 6 - 16 might provide some price relief. It didn't! I even tried booking multiple stop flights, but still no relief.
By accident, I left my leave date as the 5th and changed my return date to the 16th, and BOOM....$520 pp. So I called Couples and changed our date to 5 - 16. We will spend another $350 or so for another night in paradise, but will save over $1000 in airfare with taxes and fees.
Don't know if this will work for or help others, but it is worth a try.
Peace, Love, and Respect
CN 2002, COR 2007, CTI 2009, 2010, 2011
CTI June 4-15, 2012