Rates seem to be mostly available late August and most of September.
Flights look mostly direct.
For 7 day trips
HNL to SFO leave on Sept (1, 4, 8, 11, 15, 18 and 22) Oct (9, 13, 20 23) $219
SFO to HNL leave on Sept (12, 19, 26) Oct (17, 27) $219
If your coming from SFO and want a hotel. Then go to orbitz.com Book Hotel+air and select one of these dates for 7 day min stay and use coupon code: 100Vacation for 100$ off your package. Sample date of 9/12-9/19 came up with a total cost for two of 754$ after the coupon(staying at 2* Holiday Surf Hotel).
If you have a Discover Card and plan to book with orbitz. Log onto Discovercard.com and select shop discover retailers select orbitz for an additional 5% cashback.
So far as of 10:30am Hawaiian airlines hasn't matched some of my sample days but it might.