Spirit Airlines offers roundtrip flights to Las Vegas from select cities in the U.S. with prices starting at $76.18, as provided by ShermansTravel. (Click on "Spirit.com" in the main paragraph to see this sale; all taxes are included.) That's the lowest price we could find for select routes by $10. This price is valid on flights departing from Los Angeles, CA, (LAX) with arrival in Las Vegas, NV, (LAS) on January 11, 2015 with return on January 20, 2015. Book this travel deal by December 31 for travel through January 31, 2015. Click here to see more routes.