Hmmm....I've found this point of reference on the web. http://www.tripadvisor.com/Travel-g1...rture.Tax.html
Looks as if I purchased a ticket the departure tax is included. Since I got an "iffy" answer from Southwest, I'll just set aside about $50 US just in case. If we don't have to cash out on our departure, that will buy us a nice lunch on the way home. (Though I suspect it's included).
