Best Time to Fly BNA to MDW: On-Time Stats by Hour & Airline
Nashville International → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 74.9% of Nashville (BNA) to Chicago (MDW) flights arrived on time (1,894 scheduled flights). That is 2.7 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (89% on time) and Sunday the weakest day of the week (75%).
1.3% of flights were cancelled, versus 1.8% nationally.
BNA 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 | 74.9% | 51 min | 1.3% | 1,894 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BNA to MDW
On-time arrival % by scheduled departure hour (local time), 3,818 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 96.5% | 0.8% | 377 |
| 6am–7am | 91.4% | 1.7% | 118 |
| 7am–8am | 94.3% | 3.1% | 291 |
| 8am–9am | 95.9% | 0.0% | 172 |
| 9am–10am | 87.0% | 0.7% | 141 |
| 10am–11am | 83.6% | 1.1% | 180 |
| 11am–12pm | 86.6% | 1.4% | 144 |
| 12pm–1pm | 83.8% | 3.1% | 159 |
| 1pm–2pm | 78.4% | 0.0% | 261 |
| 2pm–3pm | 84.4% | 0.6% | 161 |
| 3pm–4pm | 72.2% | 1.9% | 215 |
| 4pm–5pm | 70.9% | 1.0% | 306 |
| 5pm–6pm | 69.4% | 0.9% | 115 |
| 6pm–7pm | 71.6% | 0.5% | 216 |
| 7pm–8pm | 55.6% | 1.8% | 229 |
| 8pm–9pm | 74.6% | 0.3% | 300 |
| 9pm–10pm | 69.5% | 0.4% | 240 |
| 10pm–11pm | 69.1% | 1.0% | 193 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BNA 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) | 86.1% | +4.0 pts | 1.4% | 74 |
| Christmas & New Year (Dec 20 - Jan 3) | 81.7% | -0.4 pts | 0.0% | 154 |
| Summer peak (Jun 15 - Aug 15) | 68.3% | -13.8 pts | 1.0% | 698 |
| All other days | 82.1% | — | 1.2% | 2,892 |
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).