There are great helicopter tour opportunities on all the major islands. On Oahu you would tour over Waikaki Beach, Diamondhead crater and the eastern and sometimes north shore.
On Maui the feature is HaleakalaCrater , the eastern shore and Hana.
On Kuai the features are Waimea Canyon and the Napali Coast (think Jurasec Park).
On Hawaii (Big Island) the features are the two active volcanoes and the opportunity to see lava flows and lava hitting the ocean.
There are a dozen or so operators on each island . The largest, operating on all the islands, is Blue Hawaiin. Be careful, if ships are in port, many of the largest are booked solid through ship's excursions.