Most delayed flights from GUM: every route ranked

2 regularly flown nonstop routes from Antonio B. Won Pat International Airport, worst on-time record first (Aug 2025 – Jul 2026). Routes with fewer than 360 flights in the period are listed separately.

#	Destination	On time	Cancelled	Avg delay	Airlines	Flights
1	GUM → HNL Honolulu, HI	88%	2.7%	10 min	1	365
2	GUM → SPN Saipan, TT	90%	2.7%	5 min	1	365

Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.