We're flying from MCI to MCO on 2/13 and from MCO to MCI on 2/19 and paid $254 total per ticket on Midwest Airlines. I could have gotten Southwest for about $9 less per ticket but to me it was worth the extra money for the "upgrade" to Midwest. Both Southwest and Midwest have nonstop flights both ways between MCI and MCO.
The other interesting thing: We're flying back on the Sunday before President's Day. If we had flown back the Friday before (2/17) or the Tuesday after (2/21), our round-trip cost would have dropped to about $179 -- around $75 per ticket savings. With six tickets needed for my household, it was awfully tempting to save the $450 and spend it on an extended Disney stay but we decided we couldn't keep our DS's out of school any more days (and we certainly couldn't cut our Disney trip short!).
17 days to go (but who's counting?)...
-- Rob