I cant take credit for putting this list together but I plan on passing it along whenever I can!
SWA-Here is what they've done in the past:
Mar 13/03 - open to Sep 8/03
May 14/03 - open to Oct 24/03
June 26/03 - open to Dec 13/03
July 24/03 - open to Jan 16/04
Sep 19/03 - open to Mar 6/04
Oct 16/03 - open to April 2/04
Dec 11/03 - open to May 8/04
Jan 13/04 - open to Jun 11/04
Feb 13/04 - open to Aug 7/04
Mar 25/04 - open to Sep 13/04
May 5/04 - open to Oct 29/04
July 15/04 - open to Dec 11/04
July 29/04 - open to Jan 14/05
Sept 23/04 - open to Mar 3/05
Oct 22/04 - open to April 1/05
Dec 9/04 - open to Jun 6/05
Feb 18/05 - open to Aug 3/05
Mar 17/05 - open to Sept 12/05
May 12/05 - open to Oct 28/05
July 15/05 - open to Dec 12/05
Aug 18/05 - open to Jan 9/06
Sept 26/05 - open to Feb 3/06
??????? - open to June 9/06
and here is some data based on those dates:
2004 data- whenever the open schedule drops down to to the 112-135 range, the schedule is then extended to be in the 150-177 range.