I would recommend "Hotwire.com", I have used expedia etc and I have stayed at some of the nicest hotels for about &50 to $ 90 dollars a night. They also offer airline and car rentals-

travelzoo.com is the absolute best flight for flights. It compares ALL companies on the internet including travelocity, orbitz, and all major airlines with flights in between. Go to super search. good luck!

if you live in chicago, i will bet you that southwest will be the cheapest way to get to Las Vegas for a last minute flight.

You will have to fly out of Midway and not O’Hare. With more than 2 weeks notice you should be able to fly for around $200 round trip.

try this website
http://www.ytbtravel.com/davidmartey
click on farebuzz

I like travelocity.com or expedia.com. Sometimes you can find better deals on the individual airline’s websites. Good luck.