I'm not booked with Southwest until Christmas/New Years.
I have been monitoring the flights to ALL cities in Florida out of Atlantic City, Philadelphia and Newark for this time period. The prices have been extremely high right off the bat, the highest I've ever seen for holiday travel - JetBlue, AirTrain, all the major carriers. Yesterday, I found myself lucky enough to purchase $300 round-trip air from Philly to Fort Myers (my destination in Florida - not going to Disney). The prices of the other carriers, before the Spirit Air strike, were $400 and more, including Spirit.
When Southwest posted the tickets yesterday, I jumped at the offer of $300 for a non-stop, round-trip. I don't think if Spirit goes back to work that the Southwest fares will go down.