Best Time to Fly TUS to ORD: On-Time Stats by Hour & Airline
Tucson International → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
1,040 flights were scheduled from Tucson (TUS) to Chicago (ORD) in the last 12 months, and 76.6% of those that flew arrived on time, 1.1 points below the US average of 77.6%.
Among 3 airlines, SkyWest Airlines led with 77.0% on time and United Airlines was last with 75.3%.
Over 24 months, Saturday was the most reliable day (85% on time) and August the worst month (74%).
The cancellation rate was 1.4% (US average 1.8%).
TUS to ORD on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 77.0% | 64 min | 1.9% | 462 |
| American Airlines | 75.4% | 108 min | 1.2% | 482 |
| United Airlines | 75.3% | 95 min | 0.0% | 77 |
| Envoy Air | Limited data | 19 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly TUS to ORD
On-time arrival % by scheduled departure hour (local time), 2,269 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 3 | |
| 5am–6am | 88.5% | 0.0% | 113 |
| 6am–7am | 88.2% | 2.6% | 264 |
| 7am–8am | 90.0% | 1.0% | 406 |
| 8am–9am | 88.7% | 1.9% | 154 |
| 10am–11am | Limited data | 2 | |
| 11am–12pm | 79.8% | 0.8% | 389 |
| 12pm–1pm | 75.2% | 0.8% | 661 |
| 1pm–2pm | 77.8% | 0.7% | 151 |
| 2pm–3pm | 71.6% | 0.0% | 88 |
| 3pm–4pm | Limited data | 7 | |
| 11pm–12am | Limited data | 31 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on TUS to ORD
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 77.5% | -5.7 pts | 8.7% | 46 |
| Christmas & New Year (Dec 20 - Jan 3) | 85.4% | +2.3 pts | 0.0% | 96 |
| Summer peak (Jun 15 - Aug 15) | 76.5% | -6.7 pts | 2.4% | 331 |
| All other days | 83.2% | — | 0.7% | 1,796 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).