We flew SW last May out of Bradley/Hartford and bought our tickets on-line as soon as our dates opened up (am guessing it was Jan/Feb.) at about $200ish per person, which was better than Delta's prices. Around late March or so, I noticed that the internet prices available for our flight had dropped to either $79 or $59 per person each way (awesome!), so I rebooked on-line and got a credit. Someone here posted that if you called customer service, they often refund back to cc if your rebook was on the same flight and date, and I did and they did (thank you disboards!).
This year we're going down in August and it seems like a different thing. Our dates are opened way sooner (thought I'd have to wait a few more months) but also hugely more $$. Haven't booked either Delta or SW at these prices, and will wait some more.