Best Time to Fly ORD to AUS: On-Time Stats by Hour & Airline
Chicago O'Hare International → Austin - Bergstrom International
Data through July 2026 · Last updated October 18, 2026
3,174 flights were scheduled from Chicago (ORD) to Austin (AUS) in the last 12 months, and 72.9% of those that flew arrived on time, 4.8 points below the US average of 77.6%.
Among 6 airlines, United Airlines led with 79.1% on time and American Airlines was last with 66.2%.
Over 24 months, Tuesday was the most reliable day (78% on time) and July the worst month (64%).
The cancellation rate was 2.0% (US average 1.8%).
ORD to AUS 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 | 79.1% | 67 min | 1.1% | 1,511 |
| Envoy Air | 73.3% | 68 min | 2.3% | 88 |
| Republic Airways | 68.9% | 54 min | 5.3% | 95 |
| Frontier Airlines | 68.3% | 128 min | 4.6% | 109 |
| Southwest Airlines | 67.8% | 62 min | 0.6% | 176 |
| American Airlines | 66.2% | 84 min | 2.9% | 1,195 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to AUS
On-time arrival % by scheduled departure hour (local time), 6,176 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 4 | |
| 6am–7am | Limited data | 3 | |
| 7am–8am | 88.9% | 1.0% | 511 |
| 8am–9am | 84.9% | 0.5% | 779 |
| 9am–10am | 82.4% | 0.7% | 430 |
| 10am–11am | 73.5% | 1.7% | 235 |
| 11am–12pm | 75.6% | 0.7% | 281 |
| 12pm–1pm | 78.8% | 1.5% | 201 |
| 1pm–2pm | 78.2% | 0.6% | 909 |
| 2pm–3pm | 67.4% | 1.4% | 432 |
| 3pm–4pm | 67.5% | 0.7% | 153 |
| 4pm–5pm | 71.3% | 0.0% | 355 |
| 5pm–6pm | 65.5% | 2.9% | 173 |
| 6pm–7pm | 67.4% | 1.1% | 174 |
| 7pm–8pm | 67.1% | 2.4% | 827 |
| 8pm–9pm | 67.2% | 2.8% | 504 |
| 9pm–10pm | 44.5% | 5.5% | 202 |
| 11pm–12am | Limited data | 3 | |
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 AUS
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) | 69.9% | -6.3 pts | 4.2% | 118 |
| Christmas & New Year (Dec 20 - Jan 3) | 74.2% | -2.0 pts | 0.0% | 213 |
| Summer peak (Jun 15 - Aug 15) | 67.4% | -8.8 pts | 2.1% | 1,089 |
| All other days | 76.2% | — | 1.2% | 4,756 |
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).