UNLV is easy to reach from the airport. Major airlines stop at the McCarren International Airport (LAS), which is only 10 min drive from our campus. In particular, Southwest airline is affordable and flies to Las Vegas from many nearby cities (LA, San Diego, Phoenix, etc.). Once you arrive at the airport, simply take a taxi from outside the terminal (should be <~$15 including tip).
If you're an invited colloquium speaker, our department will most likely reserve a hotel for you at the Hyatt Place (4520 Paradise Road, Las Vegas: 702-369-3366) or at the Bluegreen Club 36 (372 E Tropicana, Las Vegas, 702-856-2970).
Other options for a longer stay of one to a few weeks are: Comfort Inn (4350 Paradise Road, Las Vegas, 702-938-2000) or Extended Stay Hotels (1550 E. Flamingo Rd, Las Vegas: 702-731-3111). There is also a on-campus guest housing available in student dormitory, which would be suitable for visiting students.
The UNLV campus is located only about 1.5 miles East from the famous strip, in the central part of Las Vegas valley. The Department of Physics and Astronomy is #62 on the campus map, and the building name is Bigelow Physics Building (BPB, for short). The HYATT PLACE hotel is at the top-middle part of this map, at the corner of Paradise and Harmon, which is about a 10 minute walk from the department. The Extended Stay Hotel is about a 30 min walk from the department.
If you live in nearby cities and would like to drive to Las Vegas, here are some tips. From San Diego, take I-5 North, then I-15 North, total ~6 hrs. From LA, I-210 East, then I-15 north, total ~4.5 hrs. The traffic is usually very bad near San Bernardino. We recommend that you stop at Barstow for a rest and coffee (Starbucks exists), because there's not much between Barstow and Las Vegas. If you're coming from Arizona, you'll probably take I-40 West, then Rt. 93 North, through Kingman.