$161 RT Washington, DC to Las Vegas (and vice versa) on American Airlines

Very limited dates (mostly Tues-Sat or Sat-Sat) but great fare on American Airlines from Washington, DC (IAD) to Las Vegas (LAS) and vice versa.

Sample Fare: Dec 12-16
Airline: American Airlines
Dates: December and January
Booking: Search on Google Flights for dates and fares, then book direct with American.