I found seats departing Atlanta ATL on Wednesday, March 13, returning from Las Vegas LAS on Tuesday, March 19.
Other dates are available for travel on Tuesdays and Wednesdays through May, with a 21-day advance purchase required. Saturday travel is also available in May.
Delta is offering the same price in Basic Economy and there are lower fares on ultra-low-cost carriers Spirit and Frontier, but I'd recommend flying either Southwest or Delta. Southwest has the added bonus of two free checked bags and no change fees if you like to travel with a lot of luggage and/or have the flexibility to change plans without extra fees.
See our fare details for booking info.
For more deals to Sin City, have a look at all of our fares to Las Vegas (LAS).
Need a room in Vegas? Here's a look at what's available for the mentioned dates on Hotelwatchdog.