If you do want to sightsee, it will be much easier with a car. One major benefit is you'll be able to do things at your own pace. Oahu isn't big; without stops, you can drive around the island in about two hours. That said, there are things you might want to see and do that aren't accessible by public transportation.

It's convenient, cost-effective, and reliable. However, there are some drawbacks to consider. Uber may not be available in all parts of Oahu, and fares can surge during peak times. Additionally, you may have to wait longer for an Uber than for a taxi or rental car.

Public transit, bike shares and your own two feet offer cheaper alternatives to renting a car in Oahu.