FINALLY!!!!
I've scoured the net for the details on this promotion and have finally came up with verification that it does indeed exist. On the Hersheys website it is briefly mentioned on their question and answer page.
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EXCERPT FROM HERSHEYS WEB PAGE:

Q: I am looking for the form for free airline ticket with proofs from Hersheys, where can I find this?
A: That would be the HERSHEY/SOUTHWEST ‘Save and Soar’ Rebate, and you don’t even need a form to participate. Call 1-800-468-1714 for more details

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The following link will take you there so you can check it out for yourself. You need to scroll way down to find it. Check under questions posted August 10,2000. It will soon be under their archived questions as they add new questions each day. http://www.hersheys.com/kidztown/messageask.html

A couple things I find interesting.
First, this promo has been out for about a month and nearly noone knows about it.
Second, seems they don't want too many people to find out about it, which means it must be a heck of a deal.

At least it ain't summer and I don't have to worry about all of that chocolate melting in my car!!!