I just did a quick check of available seats.

Looking at the entire months of June and July (more than 1 month away from today's date)
From Atlanta (Airtran's Home Base) to:

Cancun- 0 coach seats available

Jamaica- coach seats avail only on Tuesdays
0 coach seats available on return

Seattle- 0 coach seats available

San Fran- Coach seats avail on June 8 and 14 only
Return coach seats available on June 7 and 14 only

Puerto Rico- 0 coach seats avail

Aruba- 0 coach seats available

Los Angeles- 0 coach seats available

Phoenix- Coach seats avail on July 3, 5 and 6 only
Return coach seats available on July 26, 27, and 28 only

San Diego- 0 coach seats available

Las Vegas- Coach seats avail on June 21 only
0 coach seats available on return

I also checked for coach seat availability from Atlanta to Las Vegas for the month of May; on the days on which I would typically travel for a weekend getaway.
0 coach seats available on any Thursday or Friday- to LAS
0 coach seats available on any Sunday or Monday- to ATL