Best Time to Fly ORD to TUS: On-Time Stats by Hour & Airline
Chicago O'Hare International → Tucson International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 69.9% of Chicago (ORD) to Tucson (TUS) flights arrived on time (1,042 scheduled flights). That is 7.7 points below the national average of 77.6%.
SkyWest Airlines was the most punctual of the 3 airlines on the route at 72.1%, while American Airlines trailed at 68.1%.
September has been the best month (82% on time) and Friday the weakest day of the week (70%).
1.6% of flights were cancelled, versus 1.8% nationally.
ORD to TUS 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 | 72.1% | 74 min | 2.4% | 463 |
| United Airlines | 71.4% | 88 min | 0.0% | 77 |
| American Airlines | 68.1% | 83 min | 1.2% | 483 |
| Envoy Air | Limited data | 19 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to TUS
On-time arrival % by scheduled departure hour (local time), 2,272 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 1 | |
| 8am–9am | 85.0% | 0.0% | 279 |
| 9am–10am | 80.2% | 0.5% | 833 |
| 10am–11am | 76.9% | 0.0% | 157 |
| 11am–12pm | 62.8% | 0.0% | 43 |
| 12pm–1pm | Limited data | 6 | |
| 1pm–2pm | Limited data | 10 | |
| 3pm–4pm | Limited data | 13 | |
| 5pm–6pm | Limited data | 15 | |
| 6pm–7pm | 68.4% | 0.0% | 38 |
| 7pm–8pm | 72.4% | 2.5% | 439 |
| 8pm–9pm | 60.8% | 2.3% | 262 |
| 9pm–10pm | 55.0% | 0.8% | 132 |
| 10pm–11pm | 37.2% | 2.3% | 44 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ORD to TUS
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) | 69.8% | -5.7 pts | 6.5% | 46 |
| Christmas & New Year (Dec 20 - Jan 3) | 74.0% | -1.5 pts | 0.0% | 96 |
| Summer peak (Jun 15 - Aug 15) | 67.1% | -8.4 pts | 2.4% | 330 |
| All other days | 75.5% | — | 0.7% | 1,800 |
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).