Most delayed flights from SUX: every route ranked

2 regularly flown nonstop routes from Sioux Gateway Airport / Brigadier General Bud Day Field, 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	SUX → DEN Denver, CO	70%	2.5%	30 min	1	518
2	SUX → ORD Chicago, IL	78%	1.6%	23 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.