I was going to post a similar topic but I'll piggy back off yours since I'm also flying from SLC, but in June 2018. Prices keep going up for Delta, almost $300 more than United or Alaska. Right now I'm looking at almost $1200 for the flight that I want.
For SLC to OGG, the lowest I saw for June 2018 was around $950 for a Saturday Departure and Return. Wednesday to Wednesday reservations seem to be the least expensive, around $700.
If I cut my vacation short by 1 day, doing a Saturday to Friday, my lowest flight is around $957, where my preferred return flight would be $1018. I hate to cut my vacation short but saving over $200 on 5 tickets really adds up.