Rental car is essential — the Big Island has no public transit network suited to visitors, and attractions are spread across an island larger than Connecticut. Two main airports serve visitors: Ellison Onizuka Kona International Airport (KOA) on the west side and Hilo International Airport (ITO) on the east side.
- Hele-On Bus: A limited free county bus system connects main towns, but with infrequent schedules impractical for touring.
- Driving distances: Kona to Hilo is about 2 hours via Saddle Road or Hamakua Coast; a full island loop is roughly 225 miles.
- 4WD recommended if visiting Waipio Valley floor, South Point, or unpaved backroads — most rental agreements prohibit standard cars on these routes.