The pier is located downtown and about 10 minutes from Waikiki. The airport is about 15 to 20 minutes away from the pier. The time difference between California and Hawaii was 3 hours. We were able to do the climb Diamond Head tour first thing in the morning before we boarded the Pride of Aloha on July 4th. From the top of Diamond Head, you could see a lot of Honolulu. It was really cool and quite awe-inspiring climbing through bunkers to get to the top, the same bunkers our soldiers were in when the Japanese planes came through to bomb Pearl Harbor. Great time on Diamond Head. Enjoy!!