Southwest does
Northwest, Sun Country and Southwest all fly to Las Vegas (LAS) from Minneapolis Minnesota (MSP)
Alaska airlines and i think southwest
There are often times discounts when traveling to Las Vegas. Some airlines may give a small discount at Cirque De Soleil if you go with their airline.
Virgin fly from gatwick direct to Las vegas.
Alliegint Air and Spirit Airlines both offer low cost service to Las Vegas. These airlines are discount air carriers.
Traveling to Las Vegas is pretty cheap to begin with. There are number of sites for you to get there. I'd check the airlines like southwest which fly their regular as well as auction sites like Priceline.com
It depends on what airline you want to fly.
yes of course you need a passport to fly to las Vegas you need a passport to fly anywhere! No you don't if you live in the United States you don't need a passport to fly to Las Vegas.
yes "America got talent" does fly people to Las Vegas
Expedia offers the best Las Vegas packages to fly out there for the week. www.ShermansTravel.com also offers very good Las Vegas packages to fly out there for the week Orbitz.com offers great packages to Las Vegas. If another customer books the same hotel for less, they will refund the difference.
No, currently March 2012 they do not.