Denver (DEN) to Sioux City (SUX): On-Time Performance
Data through July 2026
Denver (DEN) to Sioux City (SUX) effectively runs on two schedules. In December 2024, 94% of arrivals were on time; in June 2025 that fell to 43% — a 50-point seasonal swing. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (88% vs 78%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 1.4
- last 12 months
- Duration
- 1h 39m
- scheduled
- Distance
- 466 mi
Monthly on-time trend
Best time to fly from DEN to SUX
Aim for departures around 8 a.m. (91% on-time); avoid 2 p.m. departures (53%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 23 min |
| Tuesdaybest | 88% | 6 min |
| Wednesday | 86% | 8 min |
| Thursday | 79% | 10 min |
| Friday | 74% | 20 min |
| Saturday | 81% | 15 min |
| Sunday | 77% | 25 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations41%
- National airspace system16%
- Weather5%
Frequently asked questions
- How often are flights from DEN to SUX delayed?
- 21% of DEN–SUX flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 16 minutes.
- What is the best time of day to fly from DEN to SUX?
- Departures around 8 a.m. have the best record (91% on-time), while departures around 2 p.m. have the worst (53%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to SUX?
- The scheduled DEN–SUX flight time averages 1h 39m over 466 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are DEN to SUX flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from DEN to SUX?
- June 2025 was the roughest month in this dataset, with only 43% of arrivals on time. The best was December 2024 at 94%. If your dates are flexible, that 50-point gap is worth planning around.
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Based on 913 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.