They would never sub a 757 on that route, do to range, capacity, and the lack of spares. Very rarely you might see a 747.

Now that there are multiple 330 flights into HNL, I suppose you could see other swaps (like the daylight SEA flight shifting to a 757). But even that seems unlikely given how tightly utilized the 757-300s are (which remains my explanation for why we have 330 service on SEA-HNL in the first place).

All this does remind me of how painful it was a few years ago when they transitioned from DC-10s to 757s on the West Coast-Hawaii routes. Equipment in and out of Seattle would change multiple times in the weeks and sometimes days before flights.