Southwest Airlines has some great promotions and can get you to Las Vegas cheap and in a jiffy! There is a vacation price calcualtor on LasVegas.com which gives you a very accurate guess of what it cost you to get to and from Las Vegas with or without the kids or a big or small group etc. I encourage you to use this tool, it was very helpful for me and many others.

See David Copperfield on your trip. A must see!