HA is a rightly operational Sat afternoon flight. Nice plane (A330) and really good in flight service.

UA is variable to SFO then 787 to Tahiti. You have 2 legs of operational risk, but 3 flights a week each way. As you know, an issue of living in Hawaii is every flight is 5 plus hours, so I use HA to the South Pacific.

as to the question you asked, I can get it to show the flight via multi-city. You might be bumping into a day without a flight…. Using UA to ticket from Google also works.