United Airlines have a few round trip airfares travelling from Washington DC (IAD) to Las Vegas (LAS) for $175, nonstop. These are basic economy fares and is restricted to only 1 small personal item on board and you’ll be in the last group to board.
Travel Availability:
Departs IAD: Dec 4, 9, 11
Departs LAS: Dec 4, 6, 11, 13, 18
To book this, use the travel dates and book it on Expedia . Bundling hotel with airfare will save money.
.
http://www.expedia.com/