Unfortunately, that is about right. When are you traveling? Weekdays can often be booked at a lower fare. Southwest will give you a credit if you find a lower fare, so you can always book now and hope for the best. Did you install DING? You can sometimes get a cheaper fare that way, although ISP to MCO have been very scarce lately. Also, be sure to sign up for Southwest emails. They sometimes have lower fares, even if you can get $99 each way, it is a savings.
Good luck.