Which Hawaiian inter-island airline should to fly with for the lowest price?

Seems there's a few Hawaiian inter-island airlines available. All seem to have the same rates though. So which one is best? Are there any special known promotions with one particular airline over another?|||Use Hawaiian Airlines and check for cheaper flights during the day--sometimes as low as $50 depending on the time. Island Air is not on the search sites, and might be cheaper but it's a slower plane.|||The biggest difference is the size of the aircraft and that GO lands at some of the smaller airports. ie. they will land at the airport just north of Ka'anapali whereas Hawaiian Air lands only at Kailua. Hawaiian Air flies 737s.