One time entry. Sweepstakes runs from 9/1/2006-9/28/2006.
Prize: One (1) Grand Prize consisting of airfare on Southwest Airlines for four (4) people on scheduled service from the airport nearest the winner's residence served by Southwest Airlines to Las Vegas, NV, and two (2) rooms with three (3) nights hotel accommodations at Monte Carlo Resort and Casino, and roundtrip airport/hotel transportation provided by Showtime Tours. Approximate retail value of Grand Prize is $2500. Travel is based on availability and must be completed by 9/30/2007. Blackout dates and restrictions apply.
Enter here (rules are in same link):
https://www.secure02.com/Southwest/specials/detail.asp?xmlfile=FS0122