Closest Mainland to Hawaii: North America (Not Mexico, Japan, Philippines)

Hawaii is 2,390 miles (3,850 km) from California—the nearest continental landmass.

Reference Point	Distance from Honolulu
California coast (Point Arena)	2,390 mi
Mexico (Baja California tip)	~2,800 mi
Japan (Tokyo)	3,850 mi
Philippines (Manila)	5,300 mi

Hawaii is often grouped with "Pacific" but is geologically and politically North American (Pacific Plate, US state).

Hawaii's location made it the US Pacific Fleet headquarters (Pearl Harbor) and a critical mid-Pacific refueling/stopover point historically.

South Pacific