Honolulu International Airport offers an Economy Parking Lot. The rate is $12 per 24 hours or fraction thereof (prices subject to change).
A cell phone lot is available and the vehicle must be attended at all times. Maximum wait time is one hour.
Other parking garages are available in front of the terminal. Free parking for the first 15 minutes, then $1 for the next 15 minutes, and $2 for the first hour, maximum $15 per day. The InterIsland garage is popular on the weekends and holidays and usually fills by 2pm.