AS flies 739s to Hawaii all the time from Seattle and I can't remember when they had a range problem due to winds - of course they don't cram and squeeze as many people on board, so W+B may allow for more fuel.

I am still waiting for either Boeing or Airbus to launch a larger narrow body that is wide enough for 6 seats of 19" width but too narrow to squeeze in another seat if they went down to 16" wide...basically forcing the airlines to either add seat comfort or a wider aisle, but not another seat so the market can shame carriers that don't update the seat size for the longer flights these aircraft will make.