SWA does not offer any non-stops to MCO out of DTW. You will have to make a connection at BNA, STL, MDW, or sometimes 2 of those.
I usually can get a decent price on SWA around the holidays compared to NWA. Spirit is OK, but they fly the MD-80s. 2 weeks ago, I flew one of the older ones and my wheeled carryon that normally fits in a 737+ overhead didn't fit in the overhead on Spirit and I had to gate check it.
If the price is coming out the same, I'd go with NWA because most of the time you can snag a non-stop. BUT, don't think that the flight you pick is written in stone. NWA has a habit of changing flight times a lot!!
I am flying NWA tomorrow to Vegas, SWA from Vegas to CA and NWA home. later in the summer I am booked on a couple of NWA flights to PVD and again to MCO. With all the talk of the mechanics strike, I hope I can get to my destinations and home again!
pinnie