Best Time to Fly AUS to ORD: On-Time Stats by Hour & Airline
Austin - Bergstrom International → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 72.7% of Austin (AUS) to Chicago (ORD) flights arrived on time (3,171 scheduled flights). That is 4.9 points below the national average of 77.6%.
United Airlines was the most punctual of the 6 airlines on the route at 75.3%, while Frontier Airlines trailed at 68.3%.
September has been the best month (83% on time) and Friday the weakest day of the week (74%).
2.3% of flights were cancelled, versus 1.8% nationally.
AUS 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 |
|---|---|---|---|---|
| United Airlines | 75.3% | 81 min | 1.3% | 1,510 |
| Envoy Air | 72.6% | 62 min | 2.3% | 86 |
| Southwest Airlines | 72.0% | 57 min | 0.6% | 176 |
| American Airlines | 70.0% | 106 min | 3.2% | 1,195 |
| Republic Airways | 69.7% | 71 min | 6.3% | 95 |
| Frontier Airlines | 68.3% | 143 min | 5.5% | 109 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly AUS to ORD
On-time arrival % by scheduled departure hour (local time), 6,172 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 29 | |
| 6am–7am | 83.8% | 3.2% | 799 |
| 7am–8am | 86.6% | 1.2% | 575 |
| 8am–9am | 87.3% | 1.5% | 527 |
| 9am–10am | 88.6% | 0.4% | 275 |
| 10am–11am | 83.3% | 1.3% | 529 |
| 11am–12pm | 72.9% | 2.0% | 245 |
| 12pm–1pm | 82.1% | 0.2% | 578 |
| 1pm–2pm | 78.2% | 0.5% | 620 |
| 2pm–3pm | 75.1% | 0.6% | 183 |
| 3pm–4pm | 62.1% | 1.4% | 438 |
| 4pm–5pm | 63.6% | 0.5% | 210 |
| 5pm–6pm | 66.6% | 1.3% | 695 |
| 6pm–7pm | 55.5% | 3.4% | 379 |
| 7pm–8pm | Limited data | 27 | |
| 8pm–9pm | 70.6% | 0.0% | 34 |
| 9pm–10pm | Limited data | 12 | |
| 10pm–11pm | Limited data | 17 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on AUS 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) | 69.6% | -8.8 pts | 3.4% | 118 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.2% | -2.2 pts | 0.9% | 212 |
| Summer peak (Jun 15 - Aug 15) | 71.1% | -7.3 pts | 2.6% | 1,089 |
| All other days | 78.4% | — | 1.3% | 4,753 |
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).