Cheapflights currently has 50 BOS-LAS flights for under $400. Flights to Las Vegas will vary based on many factors, like date and time. Click here to find the best price for your dates on Cheapflights.
The general consensus from 762 Cheapflights users is that Spirit Airlines is a 5.8/10. Select your travel dates above for updated prices on flights from Boston to Las Vegas (BOS-LAS).