When I was living in Hawaii in the early 80s we had Hawaii Express - with coupons for 1 way HNL to LAX flights for $70 - too bad I was stuck with them when they went under.
And Mid Pacific Air - which caused a massive fare war for interisland flights - I think it got down as low as $9.95 for standby, and $14.95 for confirmed.
I'm know there were some others - any kamaainas out there remember?
I'm sure