Fly nonstop from Denver to Los Angeles for $89 round-trip on either Delta or United Airlines. We posted the Delta fare because their Basic Economy still includes a larger sized carry-on.
Searching on delta.com we found seats departing DEN on Wednesday, May 2 and returning from LAX on Saturday, May 5, 2018. Travel is available on Tuesday, Wednesday, and Saturdays through August. Summer dates are harder to come by, most availability can be found in April and May. This fare is reversible, so it will be valid for Los Angelenos to fly out to Denver at the same price.
Make sure to check out both of our Los Angeles LAX and Denver DEN flight detail pages for other great deals departing those cities.
If you need a room in Los Angeles have a look at what Hotelwatchdog has available for the listed dates in May.