Route on-time record
DEN to SUX: most on-time flights and the best time to fly
Denver (Denver International Airport) to Sioux City (Sioux Gateway Airport / Brigadier General Bud Day Field). 483 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 1.7% were cancelled. The most reliable flight number was SkyWest 5101 at 9:04 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
DEN → SUX
Denver to Sioux City: 483 nonstop flights a year
On time (12 months)
82%
Cancelled
1.7%
avg delay 14 min
Best time to leave
Before 9 AM
91% on time vs 76% 3 to 6 PM
Most reliable airline
SkyWest
80% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · SkyWest 5101 · sold as United Express, Delta Connection, American Eagle or Alaska
9:04 PM → 11:41 PM1h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 84%
- Cancelled
- 1.2%
- Avg arrival delay
- 17 min
- Arrived on time 84% of the time (80 flights, Jun 2025 to May 2026).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- 75% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 80 flights
Find 9:04 PM flight fares Opens this date on Aviasales#2 · SkyWest 5104 · sold as United Express, Delta Connection, American Eagle or Alaska
8:05 AM → 10:46 AM1h 41m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 79%
- Cancelled
- 1.8%
- Avg arrival delay
- 15 min
- Arrived on time 79% of the time (318 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 76%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Strong track record · 318 flights
Find 8:05 AM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)80%
483 flights · 82% on time as flown · 1.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM91%
146 flights · avg delay 7 min
- 3 to 6 PM76%
192 flights · avg delay 15 min
- After 9 PM88%
108 flights · avg delay 15 min
Best day: Tuesday (89%). Worst: Monday (74%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)38%
- Late-arriving aircraft34%
- Air traffic control and airport volume20%
- Severe weather8%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
DEN to SUX questions
- What time of day is best to fly DEN to SUX?
- Before 9 AM: 91% of flights arrived on time, against 76% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from DEN to SUX?
- SkyWest, with a season-adjusted 80% chance of operating and arriving on time over 483 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on DEN to SUX?
- June (68% on time); the best was November (88%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from DEN
- SUX to DEN (return)
- DEN to PHX 75%
- DEN to SLC 77%
- DEN to LAX 79%
- DEN to LAS 75%
- DEN to SEA 73%
- DEN to ORD 70%
- DEN to DFW 75%
- DEN to SAN 76%
- DEN to MSP 78%
- DEN to ATL 80%
- DEN to SFO 68%
- DEN to AUS 76%
Most on-time flights from DEN on every route →
Live status: FAA delays and ground stops