Best Time to Fly AUS to MDW: On-Time Stats by Hour & Airline
Austin - Bergstrom International → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
1,349 flights were scheduled from Austin (AUS) to Chicago (MDW) in the last 12 months, and 76.7% of those that flew arrived on time, 0.9 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (86% on time) and July the worst month (65%).
The cancellation rate was 1.0% (US average 1.8%).
AUS to MDW 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 |
|---|---|---|---|---|
| Southwest Airlines | 76.7% | 52 min | 1.0% | 1,349 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly AUS to MDW
On-time arrival % by scheduled departure hour (local time), 2,763 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.9% | 1.1% | 183 |
| 6am–7am | 92.9% | 0.5% | 370 |
| 7am–8am | 88.9% | 0.0% | 99 |
| 8am–9am | 92.2% | 0.0% | 51 |
| 9am–10am | 87.8% | 0.0% | 205 |
| 10am–11am | 90.6% | 1.1% | 185 |
| 11am–12pm | 93.2% | 1.9% | 105 |
| 12pm–1pm | 85.6% | 0.5% | 202 |
| 1pm–2pm | 81.4% | 0.8% | 131 |
| 2pm–3pm | 71.2% | 0.0% | 283 |
| 3pm–4pm | 58.3% | 2.6% | 229 |
| 4pm–5pm | 65.4% | 0.7% | 137 |
| 5pm–6pm | 63.0% | 0.0% | 46 |
| 6pm–7pm | 74.4% | 1.1% | 91 |
| 7pm–8pm | 62.5% | 0.6% | 169 |
| 8pm–9pm | 65.8% | 0.0% | 73 |
| 9pm–10pm | 69.0% | 1.3% | 159 |
| 10pm–11pm | 68.2% | 2.2% | 45 |
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 MDW
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) | 84.0% | +2.0 pts | 3.9% | 52 |
| Christmas & New Year (Dec 20 - Jan 3) | 73.9% | -8.1 pts | 0.0% | 111 |
| Summer peak (Jun 15 - Aug 15) | 68.9% | -13.1 pts | 1.8% | 515 |
| All other days | 82.0% | — | 0.5% | 2,085 |
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).