I flew the B-747 from ORD (O'Hare) to Honolulu (HNL) for two consecutive years. Each trip, I had a one day layover and made the most of it. The first several trips, I took advantage of the history and culture on Oahu. After that, I would enjoy just lying on the beach or maybe take a half day and go snorkeling on Hanauma Bay or hop on a boat and go fishing.
BTW, it looks like airfares may be going up again. The big airlines just signed a new contract. My old position is now paying $305.00 per approved hour for Captains. First Officers will be getting $209.00 per approved hour.