Sioux Gateway Brig Gen Bud Day Field (SUX) Delays and On-Time Departures
Sioux City, IA · ranked 235th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, Sioux City (SUX) had 883 scheduled departures and 78.4% of them left on time (US average 77.4%).
That ranks 235th of 333 US airports tracked on this site, with 2.1% of departures cancelled.
Over 24 months, Tuesday was the most reliable day (82% on time) and August the worst month (67%).
Best time of day to fly out of Sioux City (SUX)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 76.5% | 2.0% | 152 |
| 7am–8am | 86.7% | 2.4% | 292 |
| 8am–9am | 86.9% | 0.0% | 61 |
| 10am–11am | 75.1% | 1.3% | 224 |
| 11am–12pm | 86.3% | 0.0% | 73 |
| 12pm–1pm | 85.6% | 2.6% | 114 |
| 1pm–2pm | Limited data | 21 | |
| 3pm–4pm | 81.4% | 0.9% | 212 |
| 4pm–5pm | Limited data | 5 | |
| 5pm–6pm | 74.1% | 0.0% | 58 |
| 6pm–7pm | 62.9% | 3.4% | 382 |
| 7pm–8pm | Limited data | 18 | |
Airlines at SUX ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| SkyWest Airlines | 78.4% | 73.4% | 2.1% | 883 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of SUX
On-time departures by day, 24 months.
Best month to fly out of SUX
On-time departures by month, 24 months.
Holiday travel at Sioux City (SUX)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 26 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 69.1% | -10.1 pts | 8.3% | 60 |
| Summer peak (Jun 15 - Aug 15) | 69.4% | -9.8 pts | 2.5% | 275 |
| All other days | 79.2% | — | 1.4% | 1,251 |
Monthly on-time departure trend at SUX
On-time departure % each month, with the 12-month US average for reference.
Routes from Sioux City (SUX)
Every route from SUX with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| SUX → Denver (DEN) | 69.9% | 2.5% | 518 |
| SUX → Chicago (ORD) | 78.4% | 1.6% | 365 |