As of October 2026, Hilo International (ITO) is the most reliable major U.S. airport with 87% of flights on time, followed by Ellison Onizuka Kona International (KOA) at 86% and Kahului Airport (OGG) at 85%. The least reliable is Orlando Sanford International (SFB) at 72%.
Source: Bureau of Transportation Statistics, data through 2026-07. Updated October 2026.