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.
If you need a room in Los Angeles have a look at what Hotelwatchdog has available for the listed dates in May.