littlestix,
On April 11 ATA will drastically cut service out of IND. They will go from about 50 flights to only 4 flights a day. One of those 4 flights is a non-stop from IND to MCO.
Sometime in April Airtran will begin operating out of IND. During April and May they will only have flights to there hub in Atlanta - you connect their for other destinations. Starting in June, Airtran will have one daily non-stop between IND and MCO. Leaves IND at 12:50pm arrives MCO at 3:55 pm. The return leaves MCO at 11:00 am and arrives in IND at 12:15 pm. I checked Aug 15 -22, the cost was $79 each way - $176.90 RT including all taxes and fees. Airtran only has a schedule listed through the end of August.
Sometime June or July they will also add a non-stop IND to Tampa (TPA). Assuming you are going to rent a car this may be an option - it is about 90 minute drive from TPA to WDW vs. a 30- 35 minute drive from MCO to WDW. The Tampa schedule is - leave IND 10:40 am arrive TPA at 1:50 pm, return - leave TPA at 1:48 pm arrive IND at 3:03 pm. The price for the same Aug 15 - 22 dates was again $79 each way - $178.40 rt.
As far as ATAs viability at IND. In my humble opinion they can not long term maintain a 4 flight schedule. I believe they will need to expand to at least 10 flights per day or shut down. The overhead is just too expensive. Watch the local news - if Ambassadair (ATAs travel club) goes out of business, or the corporate headquarters moves from Indy, or if George Mickelson is removed from the board of directors. I would think ATA's days at IND are numbered if any of these happen.