Hi Keri,
As of 3 July 2011, Flynn Rider is no longer part of the Tangled play-and-greet at the Fairytale Garden in the Magic Kingdom. Rapunzel does however continue to appear daily so I would be sure to grab a Times Guide as you enter the theme park to check the times that she will be available during the day of your visit.
The only other place where Flynn has been appearing since is alongside Rapunzel at
Mickey's Not-So-Scary Halloween Party. The last party is being held on 1 November 2011 so depending on when you will be arriving at Walt Disney World, this is a possibility.
Purchase of an additional event admission ticket is required to attend Mickey's Not-So-Scary Halloween Party. If you are planning to attend, I would strongly recommend that you purchase your tickets in advance from the Walt Disney World website
HERE as some dates do sell out especially 31 October itself.
Wishing you a magical trip!