Oahu
Honolulu International Airport (HNL) serves not just as the main gateway to Oahu, but to all the islands. Rent a car there, if you plan to venture outside Waikiki (which you absolutely should!). Urban parking can be a challenge, however: budget plenty of time and even more patience, or else ample funds for pricey garages. Apps like ParkMe, BestParking, and Parkopedia can eliminate the guesswork.

Want to fully chill out and leave the driving to someone else? Most resorts—and some attractions—run shuttles. The island also has good transit with TheBus and the Waikiki Trolley, as well as taxis, the SpeediShuttle, Uber, and Lyft.